Same reason people are pissed at Biden for every handling of that 100% falls within the domain of another governmental branch. Currently the executive branch is sorta Atlasing our entire government which requires them to severely overreach their powers opening them up to checks and balances by the other highly sabotaged branches that both seemingly wish to force our entire government to accomplish nothing. The most publicized example of this is three student loan forgiveness package that Biden's administration tried to pass that got blocked, though there are lots of other examples.

The reality is that the executive branch as a whole has very little long term reach and we need to be pressuring Congress to do literally anything at all. The only time I'm going to look at Biden and say "this is his fault" is when I see Congress pass a bill doing something like sending an aid package to Gaza and/or Ukraine, only to have him refuse to sign. Which I suspect he'd actually just sign something like that through. We'll never know for sure because two of our federal branches are too busy playing something vaguely resembling a game of football where the ball is a 50 lb boulder and everyone's screaming that they keep subbing their toes on on it.