It's a bit excessive for my taste as well. Traditionally if you felt the need to cut this much just to make the sentence come out the way you want, you'd just do another take instead of making this many cuts in post. Over-cutting of spacing also makes the pacing a bit too "word-vomit" rather than "polished" imo.

I imagine this is more normalized in stereotypically "zoomer" presentation of video content, but it might also just be this guy (or their editor's) style.

He's cutting out the annoying filler words "um" "uh" etc and useless quiet/dead air. So yes you are the only one.

I'm not a fan either. It's especially weird to me since SciShow (his main channel I guess) has the complete opposite style.

Hank's videos are like that. I get stressed watching his scishow stuff too, but deal with it because the content is really interesting.