So you know of a church that is not composed of and led by frail human beings?
I certainly don’t know of any. The same goes for the many backseat Popes we have around here also.
Cardinal Burke is a man of great wisdom, intellect, and holiness. His opinion matters. However, never expect him to openly speak against the Pope.
The only one I know of is the assembly of believers, the body of Christ, led by only Christ Himself and guided by the Holy Spirit.