I'm not only single beyond the time most in my Church are (having converted into it as an adult, with no spouse as I was too busy at the time in graduate school to simultaneously date), I'm also of a different ethnic and linguistic background than the majority, since the Coptic Orthodox Church's traditional/canonical territories are Egypt, Pentapolis/Cyrenaica (Libya), Sudan, and Ethiopia and Eritrea (both of which are now independent/autocephalous). So it's very much a native African church, and I'm very much not that (grandparents from places like Ireland, Mexico, Greenland, etc).
So I can maybe relate, in a certain way. I don't really feel ostracized in church in any way, since people know I have converted some years ago (baptized in 2012), and hence I know the hymns, melodies, and other aspects of the services better than you might imagine from looking at me (sometimes when meeting new people they have asked me which of my parents is Egyptian, because they assume a non-Egyptian wouldn't know the hymns), but there is still obviously a noticeable difference culturally. When this causes me to feel a bit lonely (which does sometimes happen, despite the Egyptians' best efforts to be friendly), I try to remind myself why it is that we gather together in assemblies in the first place: to worship and praise Jesus Christ our Lord, with His good Father, and the Holy Spirit, for He has come and saved us. And so the Egyptians have their own way to do that, and I accepted that way when I accepted baptism because I believe it to represent the authentic tradition passed in that part of the world from St. Mark the Apostle, who knew and lived with Christ. And that's okay, since that just dictates the manner by which the message is passed down, not the content. (In the USA, where I am, the majority of our services are in English in most parishes.) So we all worship the same Christ, and in that we are bonded at a level that is above any of these lesser matters of culture or language difference. So I have been blessed to receive Christ our Lord together with Egyptians, Sudanese, Iraqis, other European-American converts, Hispanic people, etc. And this does help to realize.
Christ is at the center of everything. He is among us in His Church, and so when we are focused on Him, we are united and all things that may divide us melt away. The key, of course, is to carry forth that unity outside of the liturgy, which I will not deny is difficult to do (or can be), but is certainly still possible when we recognize our common faith as the basis of all of our interactions.
We also pray for the preservation of our unity in the liturgy itself, which I'm sure other churches have their own versions of too (most of the historically-attested liturgies have certain commonalities that may be found across different communions), and is a powerful reminder of our unity across all cultures and times. Here is the prayer (called in the liturgical books "The Litany of Peace") as prayed in the Liturgy of St. Cyril in the Coptic Orthodox tradition (prayed in Coptic because I can't find it in English, but I'll provide the English below):
Priest: We ask and entreat Your goodness, O Lover of mankind. Remember, O Lord, the peace of Your one, only, holy, catholic, and apostolic Church. Deacon: Pray for the peace of the one, only, holy, catholic, and apostolic Orthodox Church, for God's salvation among the people, for stability in all places, that He may forgive us our sins.
People: Lord have mercy.
Priest:
That which exists from one end of the world to the other. All peoples and all flocks, bless. The heavenly peace, send down into all our hearts. Even the peace of this life, graciously grant to us. The leader (king), the armies, the chiefs, the counselors, the multitudes, our neighbors, our coming in and our going out, adorn them with all peace. O King of peace, grant us Your peace; for You have given us all things. Acquire us to Yourself, O God our Savior, for we know none other but You. Your holy name we utter. May our souls live by Your Holy Spirit. And let not the death of sin have dominion over us, we Your servants, nor over all Your people.
People: Lord have mercy.
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Perhaps not all churches have such an emphasis on praying for the whole world like this, but it is a good sentiment, right? It's hard to feel too isolated when your ecclesiological principles require that no one be left out, even if on the ground obviously there is a difference between this person and that person.
Maybe it would be good for you to find a church that emphasizes this sort of thing? I'm not trying to stump for my Church here (since I know we're not the only ones who do this, anyway), but to point out that this approach to Christianity does exist, and is the ancient approach. (Our liturgical anaphoras date back to the fourth century AD.) We are to pray for the entire world and leave no one out.
As to the social aspects, yes...all churches have that. For instance, my old parish, being 100% Egyptian and Sudanese (except for me and the frequent Ethiopian and Jordanian visitors, and the occasional curious Anglican or Lutheran), was very traditional concerning family values. Many would say "Jeremy, we must find you a nice girl in the Church somehow." I consistently told them no thank you, because I knew I'd be moving away at the end of grad school, so I didn't want to establish deep roots there, but they still brought it up whenever they could. It got annoying, yes, but I knew it came from a good place. I eventually told one of them that if they could find a girl who was Orthodox, spoke English fluently (my Arabic is not good enough to establish a relationship with),
and could cook Egyptian food (I did develop a taste for it over the four years I was there), then they could give her my phone number. Strangely enough, my phone never rang after that.
My prayers are with you in your struggle, my friend. I want to say please do not give up on Church, as Christ has never and will never given up on us, but I don't know what your idea of "going to church" entails beyond what you've revealed in the OP, so I don't want to assume too much. I'd probably quit churches like the ones you've described too, but I do firmly believe that Christ calls us together as an assembled people. This is a major reason why I became Orthodox, instead of being off by myself with my own beliefs. But every individual's path is their own, so I pray that you will walk yours in the light established for us by our Christian forefathers, who no doubt also struggled with these same sorts of problems. (Consider, for instance, how much of the New Testament is St. Paul's epistles to churches in different places essentially telling/reminding them how to behave and how to treat each other!)
And in everything, let us all remember what, or rather Who, is most important:
He is risen. He is not here.
And out of all nations He called unto Him a chosen generation, a royal priesthood, a holy nation, and a justified people.