This is probably going to get me jumped on, but, I'm finally playing Baldur's Gate 3 and absolutely hating it. It is everything I loathe in an RPG - endless pixel bitching trying to find pointless crap. I've gotten maybe halfway through the first chapter and I've honestly given up. That UI is absolute dog water. The camera is crap. Everything is just washed together and the pathing for movement is a joke.
I don't think you deserved to be jumped on for disliking a popular game, but I am somewhat surprised that these are you specific critiques. I don't think you're even wrong per se, it's just that these aren't things that stood out as major issues to me or most people (except the path goddamn that pathing lol).
Like, for example, the "pixel bitching", you can hold down Alt (ninja'd by
@MarkB 
) to highlight pretty much all the interactable objects
worth interacting with (bodies, containers, levers, etc.) so long as they're in LOS of your party (which can be an issue - sometimes you can see something the characters can't, so you have to move them to get the game to highlight it). It's absolutely true though that there are loads of other technically-interactable objects that are well, yes, as you say "pointless crap" for the most part (and that don't necessarily show up unless mouse over them). If it doesn't come up on Alt though you can probably ignore it. Probably. And that probably itself is a problem, albeit a minor one imho.
I guess it might not be obvious that there's this divide between worth interacting with and not. I think I didn't realize it until part-way through Early Access.
There is some of what is real "pixel bitching" that isn't mostly junk too but not until Act 2 (mostly in one specific place). And it can be really painful to do things like get your characters in exactly the right position to throw an object to a specific place, sometimes, or to pile objects up. But most of those situations have other ways you can handle them.
Re: the UI being crap - it is, and funnily enough it's much improved from what it was at launch. But a lot of why it's crap is because they're trying to do so much, because this is a very "do anything" kind of game (for a certain value of anything). Doesn't make it not crap though, it's more something you gradually learn to work with. Oddly enough the console/gamepad UI (which was designed much later), whilst clunky, is kind of better.
The camera is pretty bad yeah. Though I would say the same is true of almost every non-fixed perspective isometric game. I can't think of one where it is good. Different kinds of bad, but all bad. Fixed perspective (like Diablo 4) helps a lot because they you can level-build around it.
And yes, agree on pathing too - it's dreadful, and annoying. If you're not careful, characters will absolutely hare off in bizarre directions, and sometimes the need to manually jump can be pretty tedious.
So in short, I don't think you're wrong to be irritated by these elements - they are all real weaknesses. It's just that, for I guess most players, they're the sort of weaknesses that people expect and work around, and the superior writing, fallback design and insane array of ways to solve problems (it's a lot harder to get unaccounted-for situations in BG3 than, well, any other game), charming characters (admittedly, it takes a while for some of them to warm up), and sheer breadth (and in some cases depth) of content all make up for these. Also whilst the main story could be overall more compelling, the sub-stories that make it up tend to be pretty strong, as are the character arcs (which can vary depending on how you treat them).
My personal biggest beef along similar lines to the ones you describe, after the pathing, yeah, which is terrible and inconsistent (sometimes characters will jump down a ledge or w/e and damage themselves even if you don't use jump, for example, other times they just won't) is probably that the game relies heavily on your characters spotting objects, but doesn't highlight them well and only highlights them for a few seconds, and they're inconsistent as to whether they show up when you hold down the key. Frankly, there should be an option to make any "spotted" object glow indefinitely and brightly (at least until clicked on).