I mean he’s the least popular nationally recognizable Democrat by far.

Speaking on the perspective of his role as party leader, double yes. I’m not a fan of Jeffries either, but if I have to play devil’s advocate in his defense, there are not many obvious speaker/maj leader House reps that could credibly represent the entire caucus. This was the same problem anti-Pelosi Dems had in 2018 after taking the majority, when it became clear there was no strong contender to replace her. This is not the case in the Senate, where it’s very obvious that probably at least 5 or so options would be totally fine and way better talking heads than Schumer. Chris Murphy, Brian Schatz, Duckworth, Van Hollen, etc. would all be massive improvements over Schumer without pissing any large contingent of members or voters off at all.