The problem is that Gokudera acts his age, likely, and most people don't want to bother with the drama and stupidity that comes with teenagers. He also takes little comments the wrong way and a lot more personally than he lets on.

He's also horny when it's not called for, given that he's a teenager, and he's also shy and uncertain about a lot. There's a lot more bark than bite in many interactions.

"Well, if you die here, you'll just come back." Gokudera responds casually. "I think you could just treat this like a dream, or a nightmare, or a vacation someone else planned that you have no control over." Which sucks, but... oh well. Gokudera's not made much headway on overthrowing any part of the government, and as far as the other LIERs are concerned... he can't beat 'em, so he'll join 'em.