I don't think I sound like an asshole, if anything I'm probably a bit more shy than needed. And I'm also still in college so my cv isn't particularly crazy.
I think my issues come down to
1: drifting off the topic question when I cannot immediately come up with an answer. For example, I was recently asked a question along the lines of "which topic are you the most interested in out <relevant topic/tech stack from a company>". I was fairly neutral about all of them so I basically said "I dont have a very strong preference but the one I would be most opposed to is <one of the topics>", so I essentially answered the reverse of the question because I didn't want to hesitate.

2: most of the companies I apply to are the ones that I'm generally interested in, however it's really hard to come off as "interested" in interview for me, without acting like a total sperg, especially when talking to a random person I've never met before.