I've enjoyed vanilla JS since forever, and currently work in a TS shop, and FWIW I think you're
waaaay off base. There may have been times and places where TS was heavily OO, but all the TS I come into contact with is heavily functional, class-averse, immutable by default, etc.
(In face, the Java/C++/OO-types I know strongly dislike TS because it's structurally typed. TS doesn't care a jot who extends what - as long as they have the same properties it's happy. Hard to get more un-java than that.)
The real reason that TS won is simply that large teams (e.g. hundreds) cannot effectively work together on untyped JS. If you're doing a solo project, fill your boots - use JSDoc comments, sprinkle asserts around, whatever. But the webdev world at large doesn't care about Java or OO concepts, it settled on TS because huge teams can work effectively with it.