He gives me a similar feeling to say, SBF did prior to the FTX collapse. This isn't to say he's a scammer like SBF, but rather that he has a similar hard to describe 'dishonest' air around him, where I feel he's deliberately trying to make himself seem smarter than he is for the sake of the attention alone, which makes me distrustful of him. I'm not really sure how to describe the feeling besides "attention-seeking charismatic fakes/frauds", but as another example, Bill Nye also gives me the same feeling.

His X shenanigans don't help either, where he has a reputation of engagement farming by posting dumb somewhat condescending "but akschually" type comments on things people are enjoying. Eg, when the last American total solar eclipse happened in 2017, he posted something along the lines of "ignore people when they tell you eclipses are rare", it's technically correct that eclipses happen fairly often, but he obviously had to know that what makes them exciting is that they're rare for the location the viewers are at. It's become somewhat of a meme to call someone NDT when they're being a buzzkill.

Some of the concerns are documented here: https://rationalwiki.org/wiki/Neil_deGrasse_Tyson

He switched PhD programs from Texas to Columbia and some people thought he took too long or something