Nobody has made that claim. Finland is 3rd best because they completely dominate USA in medal count and have more wins in head to head games in the last 10-20 years.
If I was American I'd expect them to fight for the best possible finish. Finland lost a heartbreaker to their rivals, Sweden, by a damn goal. There is no excuse for USA to lose the bronze game, they just simply lost to a better team. Yeah, they mentally folded at 3-0 but they tried until then. And being mentally weak is not a ticket to voiding games. If they would have checked out before the game mentally, that's even worse than losing when you are trying your best. If USA players are mentally that weak, then that is a definite huge advantage when determining which is the better team. Mental strength and never giving up is an extremely important attribute for a hockey player/team.
Canada is better than anyone. They have 10 times the registered player than Finland for example, I don't find their dominance the least bit surprising.
Excuses excuses. It doesn't matter if they lost because they were mentally weaker or just plain worse in hockey, they lost. There is a definite way to say for sure, look at the end result. Finland won 5-0 that day.
USA has absolutely no claim over Finland for 3rd place. Finland has over double the medals in best on best olympics, has more wins in head to head games, was a runner up in last world cup while USA got dropped out of semis. If all the games are counted from the best on best olympics, Finland has like 61 points compared to USA's 47...
There are no statistics that would bring USA even close. Of course you can emotionally place them at #1 if you wish. Just has no bearing in reality, facts.