I only really agree with the endgame being lackluster and that's something that will certainly improve with time as they add more mechanics that get incorporated into Monoliths. The core gear and skill systems are good, which is something that can make or break an ARPG, so saying the developers are unskilled seems a little harsh.

Until it is more fleshed out though I would definitely recommend Grim Dawn over it, which is a game with a lot of content and polish, as well as modding if it's not enough. I would recommend PoE, but it's complex enough that it might be better to wait the 1+ year until PoE2 and try that, maybe also learning PoE if it maintains a large playerbase and good support, they claimed they will continue to release just as many expansions for it.