Because his base isn't upset about those as much as they are about Epstein. He's underwater in polling on all those other things now, but his core base wasn't upset about it

Right wing media talked about Epstein a lot over the past many years. Claimed that Trump would give them all the truth. It became an ingrained belief. Then he abruptly and very suddenly contradicted all that at once and can't keep to a consistent narrative

He also directly insult his base in the back and forth. Calling them "weaklings", stupid, etc. for caring which he normally avoids doing. Normally he pretends to care about their concerns when coming up with a BS excuse