So many Catholics fail to distinguish the ESSENTIAL from the OPTIONAL. They fail to distinguish issues of certainty (i.e., we must save our souls; the Novus Ordo Mass is dangerous and noxious to the Faith itself) with issues open for debate, or optional (i.e., the status of the recent Popes).
To prove it, some people don't understand the difference between Ecumenism, and Trad-ecumenism. People actually call me Trad-ecumenist as a derogatory term! As if there's only "One True Trad Group" the way there is "One True Church"!
A Traditional Catholic is defined as: a person who deals with the Crisis in the Church by leaving the Conciliar Church and seeking out true (valid, properly formed) priests and true Sacraments/Mass (the Tridentine Mass) and not asking anyone's permission to do so.
By this definition, Sedevacantist, independent, SSPX, and Resistance would all qualify as Traditional Catholics.
Ecumenism is bad and mortally sinful because the One True Church is put on the same level as all the false religions (which ultimately come from the devil). However, it is not just good but REQUIRED to remember that "your group" isn't the only Catholic Trad group.
Objectively, yes, God might have a favorite Trad group. But He hasn't revealed it to anyone yet, at least not publicly and decisively.
So, in conclusion: show me a man who grumbles and calls Matthew of CathInfo "a blasted trad-cumenist" and I'll show you a man who is sectarian, and borderline schismatic (like the Dimond Brothers).
Sure, some Trad groups are better than others, and I believe they could be ranked. God certainly has them ranked in exact order of His preference, from the best to the worst. But none of us has access to that information. Even though some Trad leaders have problems, some might even have diabolical influence, sinful habits, psychological problems, etc. that doesn't change the fact that their group is still a legit Trad lifeboat.
Some lifeboats might be inferior, some might be leaking, some might be sinking. But if it's a Trad group, it's a lifeboat and thus it is legitimate to call them all "lifeboats" using the same term for all -- placing them on a peer relationship with each other. This is far from wrong -- it's the only way to avoid being sectarian.