Out of the loop

Schumer said that a shutdown would enable Trump to arbitrarily shutter parts of the government he doesn't like.

Trump is already shuttering the parts of the government he doesn't like, and the "CR" gives those acts the veneer of lawfulness.

If there had been a shutdown there would likely have been more pain in more places. But the Dems could have plausibly negotiated for a better result than what Schumer voted for, and aside from the pain of the shutdown itself it's not at all clear how the end result would be any worse than what we got

And despite what Fetterman and the other Senate Democrat collaborators might claim, a vote for cloture was a vote for the bill to become law. The rules of the Senate are dumb, but "this bill would not have passed save for that vote" is a pretty empirical rebuttal.

If a shutdown would favor trump and musk, than why were they celebrating his vote to keep the government open?

Because he's lying. He just didn't want to lose his staff and clubhouse access for however long it lasted.

Because a shutdown of a fascist government is better than the fascist government being able to function.

Trump thanked Schumer for the vote, and so "shutdown was not the greater favour to agenda"

Unanimity over being a terrible bill, and one of the rare opportunities for democrats to ask for anything at all as ammendments, or simply offer a clean CR to force Republicans to take responsibility for shutdown with their "terrible/unacceptable conditions/amendments" insistence was a basic path.

Chuck Schumer as a zionist supremacist favorite of the DNC, now on a hasbara book tour, means that the opportunity for military to be paid during their assistance/extension of Israel genocide to Yemen helps their motivation to conduct it. DNC as an institution has zionist supremacism as its first mandate. Winning or resisting or Americans, if they don't matter as much as that first mandate, don't matter.

My, quite possibly naive, take is that i think people are mad because he flipped. He said that he absolutely wouldn't vote for it and then flipped a day latter and said he would. This riled Dems up to fight and then immediately sent against what he had started. I also don't think that he has explained himself as to why he changed his mind.

After reading this I still don’t know why everyone is criticizing Schumer.

Government shutdowns are bad. For everyone employed by the government, receiving government services, working with government agencies, or in case anything unexpected happens. Continuing as-is is easily preferable to not continuing.

I do wonder if a shutdown invokes some sort of procedural change leaving us open to even more shenanigans.

But really the only hint I see is the term “Clean CR”. By definition , you expect a Continuing Resolution to continue. Was this not clean? Were there changes embedded that we would object to? If so, I haven’t seen any detail on this