I do want to clarify one point: The Dispensational view (rapture, etc.) is not commonly held by liberal Christians in mainline churches. Offhand, I don't think I know of any liberal Christians who are Dispensationalists.
Indeed, I don’t know of any.
Thus, in my experience, there was often a choice between a liberal church that had traditional worship, but where the pastor would deliver a liberal homily which could in some cases even be deeply offensive, or alternately, attend a conservative church, sometimes in the same denomination (for example, in the UMC before the recent change in the doctrine on human sexuality contra the ruling of the 2018 General Council), where the sermon would be premillenial dispensationalist and the music would be of the intolerable praise and worship variety.
Now this is one area where I will give the Episcopal Church some credit - despite being largely a liberal denomination, there are a great many Episcopal churches where I could attend comfortably, even though some of their clergy are quite liberal, for example, St. Thomas Fifth Ave. In New York.
Unfortunately in other denominations, such as the ELCA, this was very much not the case. And as a Protestant, I was unable to deal with the situation in my community wherein the conservative churches had become premillenial dispensationalist and the liberal churches had become very stridently so, with clergy making political remarks in homilies or, well, I recall an ELCA pastor on Easter Sunday preaching about the possibility that our Lord, God and Savior Jesus Christ was married, which was needlessly provocative, and offfensive, and also they did not even serve the Eucharist, despite it being Easter Sunday. And unfortunately there was no LCMS or other confessional Lutheran parish such as that attended by my friend
@MarkRohfrietsch to which one could escape.
Thus, what I did, as you may know, having resigned from the UCC and being totally estranged from the UMC, was to attend an Episcopal church while my friend, who was a conservative Episcopal pastor, one of the last in the diocese of Los Angleles, served his final year, and then when he retired, due to the controversy of Pope Francis, the plan A, which was to attend a traditional Latin mass parish in my area, became untenable (this was in 2014) and so I joined the Orthodox church because I was upset about the persecution of Christians in Syria and I also really liked the liturgy.
However I felt the choice was forced on me by doctrinal and liturgical changes in the Protestant churches in my community. Now, I am glad I made it, and now, given the choice, I would make it and not feel forced, but at the time, it was a situation of actually not having an alternative that I could reconcile with my conscience.