It's still worrying! His supporters still number lots of people who a) are still somehow too gullible to realize Trump and the MAGA crowd are not going to make their lives better, and b) actively want what's going on. But there are easily more eligible voters in the US who wouldn't vote for a Republican with a gun to their head, or who are finally starting to understand that "sticking it to the libs" is hurting themselves.
It's not going away, but it's likely that it's declining, and possible it will continue to do so. Whether or not it declines quickly enough, before these jackasses consolidate power and break what's left of our institutions... well, that remains to be seen.
That's half the people who showed up to vote, not "half the voting population". 1/3 of the eligible voters simply didn't vote, and from the people I've encountered that don't vote, they are mostly left-leaning.
No, stupidity and self-harm aren't going away, those are human traits. The current admin is actively hurting everyone, with tariffs and stupid wars he campaigned that he wouldn't start, ICE in every city everywhere causing chaos even to right-wing supporter-owned businesses (they wanted immigration reform but not like that!). This admin has shit the bed, and even his supporters are feeling that. They are now in the "finding out" phase, and the next phase doesn't look so good for republicans in the next election because of it.