A good post.
I personally find DND unsatisfying for many reasons (little to no degree of success, static magic system that encourages hoarding, the primary defense is all or nothing avoidance, very coarse progression, some character concepts are simply not representable, etc)
But what is even more annoying than that is when players respond with "but you can just change the rules!". I know! That's true of any pen and paper game! It's not some unique property of DND. But sometimes I don't want to do the work of designing a system, and I almost never want to play some stranger's pre-alpha homebrew.