You read all that into me literally just telling you that not wanting to use 3pp is a perfectly valid stance, because, amongst other reasons, most of it isn’t consistent with official material, isn’t well balanced, doesn’t do what it says on the tin, or some combination thereof.
There is a wealth of material that is at least as well balanced as WotCs stuff. How balanced depends on what you're looking at. First off, there is definitely a bunch of stuff that's way out of whack. But there's a some great stuff too. Class stuff can be dicey, but subclass and class balance in 5E is already dodgy, so keeping up there on the quality side isn't hard. People also play D&D at a bunch of power levels, so the extent to which a given item is balanced isn't simply determined by some kind of comparison to an average class in the 5E rules. Spells are also up and down, but, again, the spells in the 5E core are not even remotely 'balanced' by level, so it's a weak comparison. That's the player facing side. On the DM facing side there is a treasure trove of great work. Stuff that expands on areas the core books just touch on, like Shadowfell and the Feywild, as well as great stuff to play with the tone of the game - Dark Fantasy, Urban play, straight horror, all sorts of things. Never mind the host of DM aids specifically designed to help campaign construction.
The fact that there is a general consensus in the wider community about 3PP stuff is pretty meaningless. It means nothing about specific products, and nothing about the usefulness of that product to specific GMs. It's much like movie reviews, take it with a big grain of salt. What I find sad is that this general consensus could serve to keep newer GMs from sampling some of the great stuff that's out there because the received wisdom is that it's all unbalanced. The quality ranges too much for that kind of sweeping dismissal to useful or appropriate IMO.
The fact you somehow squeezed a personal insult toward you into that is entirely on you. I neither said nor implied any such thing.
Well, your post did include a very specific and pointed personal insult, so reading the rest of your post in light of that isn't particularly odd...
As for your part in the exchange, please don’t outright lie. You didn’t just state that there is a wealth of good material, you dismissed the preferences of anyone who doesn’t want to use those materials, as if the reasons weren’t well documented across the greater online TTRPG community.
And now I'm lying. Lovely. What I dismissed was the idea that you can paint all the 3PP product with a single brush (which is exactly what you did). If you want to talk about a position that indexes elitism look no further that that statement right there. There's some junk out there, and also some
great material. Dismissing the whole batch with a wave of the hand strikes me as ill considered at the very least. The 3PP publishing world isn't a monolithic thing that's all the same, and to suggest otherwise seems kind of ignorant.