I don't think TPF suffers from any problems that are unique to TPF.
There's trolls and bullies everywhere, TPF is actually quite good on that front these days, but there's a certain amount of irritable/nasty around still. Probably pretty darn close to the minimum possible in an openly accessible forum, though.
In any hurriedly written form you're going to have the problem of ", in my opinion, of course" being deleted. You should just assume that it's always there, unless the poster says "NO! THIS IS FACTS!" or something similar. We're not writing PhD theses here, we're dashing off quick notes and replies. For best results, assume that the text was intended to mean something moderately intelligent and reasonable, and attempt to find that reading in it. Sometimes we drop a "not" and it sounds like we're advocating genocide or something, so try to guess where the "not" went, and mentally put it back in.
The biggest problem I see on TPF is that there are pretty strong norms for what photos should look like. Given that this is a forum aimed at beginners, I am fairly sure that TPF is manufacturing its own believers to some extent. Any photographic forum will have a culture of what is and is not a "good picture" and that set of ideas will vary, sometimes surprisingly widely, across forums. Pictures that don't fit the local notion of "good picture" are gonna have a tough slog in the critique department. What makes TPF different is that we DO welcome and educate relative newcomers, and they get indoctrinated with the local ideas of what makes a "good picture". TPF's ideas about what's good are not horrible, but they do tend toward the Commercial Headshot/Flickr Explore side of the equation.