This topic is near and dear to my heart.
As usual the need to dominate others gets in the way within denominations and churches. However, that negative does not override the command of Christ for us to come together and complete His mission as stated clearly in His words and deeds. In the beginning the Apostles, disciples and supporters were a church. They met, ate, fellowshipped, discussed, planned, funded, healed, assisted, forgave, prayed for, taught, etc. - as well as died defending the faith. We are to do the same and that is harder to accomplish outside of organized churches today. Not impossible, but harder. We have good intentions that tend to fall away as life crowds out our priorities. If you are able to do it outside, such as house churches or small groups, more power to you and God bless your efforts.
We come to church not only to fellowship. That's just a social club of likeminded people. We come to work on helping one another and the non-believing world in The Way. "Religion" gets in the way of all of that. Participating in a Jesus centered organized church, denominational or non, provides the greatest, high point times of our week.
My wife and I were raised SBC. Changed to UMC for decades. As traditional, evangelical believers we left the UMC and went back to the SBC and found a church/group of believers we dearly love. However, we spend a couple of months a year now in another state where we regularly participate in a non-denominational church we also love. If we lived there full time we would join. Both churches go by the Word and have fundamental agreement in their interpretation. You can tell the minute you walk in because the Holy Spirit is active in the hearts of those who attend. Two of the most loving, friendly places of worship with two very distinctive and different styles of worship. In addition to being centered around Christ, teaching and loving on the children/youth/elderly, not caring about your appearance/clothes/financial situation - they both are outreach servants to their communities and the world as He instructed. That's when the rubber meets the road.
May each of you who love the Lord be blessed in whatever you do for his kingdom.