Remember that there are only two viable choices in the USA, so many people who voted for him are not dyed in the wool Trump acolytes, but people trying to pick the least worst option. I don’t blame them because there was a lot of hysteria about Trump during his first term, but nothing much out of the ordinary happened.
Also Kamala Harris wasn’t seen a great alternative, and wasn’t popular even among her own voters.
Some who voted for Trump are doubling down, and assuming because Trump has done these things, there must be a good reason or some long term plan behind it. They like some of the things he’s doing, which retains their trust in the rest of his actions, even if they can’t see a reason for it right now. These are his true fans and are gullible.
Others feel openly let down, especially because he promised “America first” and to end wars, but instead is continuing to fund Israel, has bombed Iran and might do more, failed to end the Ukraine war, is attacking Venezuela, threatening Greenland, bombing Nigeria and on and on. Also he promised to bring prices down but instead has cause global economic chaos with his aggressive tariffs.
The people who feel let down are mostly those least worst option voters, but even many of his MAGA fans aren’t happy.