I'm not complaining, more new games the better, and some of them are very interesting.
Also, at least some of these youtubers turned devs have tried Pathfinder and that wasn't it, so spare the "why won't they just play Pathfinder?" comments
Any DM can tell you that the D&D 5e rules are outright terrible in some major aspects, like magic item classification (go look at every "major rare" magic item and see how v wildly different they are in terms is vusefulness) or monster abilities (mostly just removing spellcasting for no reason).
So it's no wonder that seasoned DMs homebrew (or use/adapt other DMs' homebrew).
It is by far not as bad in many other games as in D&D IMO
I feel like D&D has a content problem, as in they're trying to push as much content out, at the cost of the quality of that content, and they're not spending that time improving the game as that would make the content incompatible.
That's been true for multiple d&d editions too, especially 3/3.5 and 2e (argurably this is what killed TSR). 5e/ODD should have learned from these lessons, but shareholders jsut want to see the line go up, I guess.
Oh absolutely, and on top of that the newer systems try to be backwards compatible with the older systems, so that content can be ported even easier... But the system makes little sense to newcomers.
One simple example for me, is how arcane generating your stats is.
Skill checks used to use 3d6, and you used to roll 3d6 for each of your stats. This made sense.
Now skill checks use 1d20+mod, but you roll 4d6dl six times, note them separately, assign them to your ability scores... And then subtract 10 and then divide by two. These you note in a little box for the modifier. No, your Strength didn't just become 19 instead of 16, we just generated the 16 so we know you roll 1d20+3 whenever you roll for strength.
Why did we even generate those bigger numbers? Do we use them anywhere? Well, the short story is “not really, they're just backwards compatibility”...