The problem, as I see it, is
not the Filioque per se but the Trinitarian understanding behind it. In my experience, people do not discuss the Trinity because they know the discussion leads to disagreements. But, when I joined the CF, I participated in Trinitarian discussions. I was flabbergasted that most people, and I mean theologically knowledgeable people, believed in what I considered to be Tritheism and I was quite disappointed. Later, I did some reading and discovered that what I considered Tritheism is actually called the Social concept of the Trinity. This is a simplistic, and thus widespread theory, and it is behind the Filioque. And far too many people consider it the proper understanding of the Trinity.
Yes, this is the Eastern concept, which I can understand and agree with.
I think this is the Social concept. It sounds like 3 Gods. But since it was your childhood belief and you grew out of it, let's not get into this

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It’s not the social concept, and it wasn’t my belief, but rather language I was exposed to, however, I still use the terminology to emphasize the deity of the three persons. Because the Son is God, the Holy Spirit is God, and of course the Father is God, and their coequality and coeternality is an article of Christian faith, as is, very importantly, their consubstantiality, or coessentiality, because it becomes tritheism is if we say the three persons of the Trinity are not of one essence (homoousios), so in a sense, Arianism, insofar as it regarded Jesus Christ as a God according to honor, was bitheistic. What I was not taught in my childhood was the doctrine of consubstantiality, but merely the phrase”one Godhood”, since the Methodist church we attended only ever used the Apostles Creed, and later stopped using any Creed, and the Lutherans did not teach it to me, so when I first came across the Nicene Creed and Quincunque Vult (the “Athanasian”) which fully explain the Trinity, it was something of a revelation. And my appreciation for Quincunque Vult was further bolstered a few years ago when I purchased A Psalter for Prayer and was delighted to find the version without the Filioque, which I knew of thanks to Metropolitan Kallistos Ware, but had not previously encountered.
Now Metropolitan Kallistos Ware has described rhe Trinity as a union of perfect love, which we are called to make an icon of in our social relations in Church, in our families, and with our fellow human beings in general, which I have heard called “the social concept” but obviously this is tempered by the fact that, as you correctly observed, Eastern Triadology, or to be more precise, Nicene Triadology (the filioque emerged at a council in Spain I believe, in the former province of Baetica, it may have been Hispania-Terraconensis, but for the moment, Niceno-Baetican Triadology has a nice ring), does not lend itself to Tritheistic interpretations since the Son is begotten from the Father and the Spirit proceeds from the Father.
A more common criticism of the filioque however is that it depersonalizes the Holy Spirit, turning Him from the Lord and Giver of Life who spoke ny the Prophets, our Paraclete and Comforter, into a unitive and impersonal spiritual force that connects the Son and the Father from whom the Spirit proceeds from in the modified form of the Creed.
Actual Tritheism is rare; the Eutychians, who believed that in the Incarnation the humanity of Christ dissolved into His divinity, thus resulting in compound nature, decolved into tritheism by the sixth century before disappearing. One of their proponents was the Hellenized Coptic philosopher John Philoponus. Eutyches, Eutychianism and Tritheism were of course anathema to the Coptic Orthodox Church and the other Oriental Orthodox churches, whose Christologt preserves the full humanity and divinity of Christ without change, confusion, separation or division, just like the Chalcedonian model, thus, for all practical purposes, Oriental Orthodox theology and contemporary Eastern Orthodox theology are equivalent, although there was a time in the fifth and sixth centuries when Oriental Orthodoxy actually positively influenced Eastern Orthodoxy, particularly the work of St. Severus of Antioch, whose hymn Ho Monogenes is part of the Second Antiphon of every Eastern Orthodox liturgy (although some EOs mistakenly claim it was written by Justinian, or other persons), and who was largely responsible for winning the theological battle against Apthartodocetism, a complex and in my opinion greatly misguided Christological belief favored by Justinian after he moved on from Theopaschitism.