Just do your best to be led by HolySpirit.
For many years I did not attend church because I agreed with your take on the institutionalized churches, and I wanted to be free from some of the negativity I saw in most of them. However, I have recently started regularly attending church and have enjoyed praising the Lord in song, the fellowship, etc.
So are you saying that now that I'm back in church, it could be harming my spiritual growth???
I always felt guilty when I wasn't attending church, like I was disobeying the admonishment in Hebrews 10:25 about assembling together, and I felt that I wasn't being a good Christian by staying at home. (I'm not saying that's why I started going to church again).
So what should I be doing at home if I am not attending church? There are no home churches around my area that I know of, and how do I remember the sabbath day to keep it holy? Does keeping that day holy entail nothing more than not working on it? Or does worshiping Him on that day constitute "remembering the sabbath"?
In summary, if I am not pleasing the Lord by being involved with a "carnal Christian religious institution", am I to leave the church? If so, then what?
Respectfully, in Christ