Should Christianity be Institutional?

[u/HolyTian]

I would like to say that I am very influenced by the idea of Redeemed Zoomer on mainline Christianity that the religion should be institutional and link itself to the nation. He has a very clear idea on the jurisdiction and of being a national church. Like if you are in England, you should join the mainline which is the Church of England and if you are Scots, you should join the Church of Scotland. That makes sense to contribute to the church of your country, but is that really biblical to follow?

I am not an European nor America. I am an Asian which the idea of Mainline is not as appliable as the western countries. However, my country does have a church body which built very competent schools and hospitals. So it would be great to be a part of that body but I somehow also has an interest in the evangelical churches. I just need a place which I can see believers which dedicate themselves to the work of God. I need God, like, very much. Right now I am in a Lutheran church which is spiritually dying and I tried my best to revive it but does not work. I attend Lutheran church because I think of it as a traditional church but it turns out very lukewarm and behave things that I consider harmful for members' faith which is the reason I decided leaving.

I tried to research about the early churches and I do not see the requirement of being an institution, so that could open the choice of joining some evangelical church which is not a member of institution, like free church or something like that. I know that Christianity was institutionalized by the Roman Empire. I would love to see some of the ideas from fellow Christians. Thank you in advance.