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Bob is unaware that he is a Troper or thinks that it is no reason to deny how "bad" (most) Tropers really are.
Bob didn't choose to be a Troper.
Bob feels that as a fellow Troper, he has a duty to hold himself and his fellow Tropers accountable, and not be a chauvinist twit in representing Troperland. Thus, all other things equal, he systematically and rigorously judges Tropers' transgressions/mistakes harsher, and downplays their achievement.
Inverted: Bob isn't a Troper... but he wants nothing more than to be one.
Subverted: Disparaging Tropers is an In-Joke among Tropers, so they take Bob's rants in stride.
Double Subverted: Bob really does hate Tropers, but lets them believe his harsh insults are just part of the In-Joke.
Parodied: It's painfully obvious that Bob is a Troper from the get-go. He rails against Tropers while wearing a Troper Badge.
It's never made expressly clear whether or not Bob's supposed bigotry is an in-joke among Tropers or not.
Alternatively, it's never made expressly clear whether or not Bob is a Troper, despite obviously hating them.
Bob isn't a Troper. He just hates them.
Bob doesn't hate Tropers.
"So, OK, get this - this guy hates a group he's a part of. Whatever they're paying me, it isn't enough!"
Defied: "You know, railing against a group I'm a part of might not be the best course of action. Maybe I'll just chill out and look at things in perspective."
Discussed: "Oh wow, it's just like something out of Law & Order."
Conversed: "(sigh) Great, another one of those 'guy in the group hates members of that group' plotlines."
Bob's hatred of Tropers while being a Troper himself causes him a great deal of anguish and mental conflict. He eventually commits suicide to cope.
Tropers are the majority, using Tropes as tools to keep down people from TheOtherWikilandia. Bob finds it outlandish that Tropers would do such a thing and distances himself from them/ Other tropers call Bob a self-hating Troper and insult him in the same way Tropers do Otherwikilandians.
Bob finds a way to reconcile to his hatred of Tropers with his identity. Either he stops being a Troper, or gets over his hatred of them.
Bob thinks of himself as an exception to the rule and sees himself as not bad as most Tropers.