No reasonable optimiser is looking to create something that is the end-all-be-all of builds. The problem is that when they created outliers like GWM + Polearm Master and SS and didn't support 1-handed playsyles the same way it immediatly creates a balance-issue for many players where they feel pigeonholed into those 2 select playstyles. "Balance in D&D is a scale, not a point" someone said in a different thread, and I fully agree, it's just that the scale has to be in a reasonable range and not have the glaring differences in top and low end values it has had for so long.
It's the exact same thing they just got rid of with Tasha and the dominance of Variant Human for race choices. The fact that those changes are only coming after SO many years, where we've gotten too the point where people are already starting to yell "5.5 when?", and the fact there are still many other systems in 5E that are plain under-developed feels off to me and getting a bit tiresome.
There is some great 3rd party content out there to fix some of those issues, and that does count to some extend, but the reach of those products (not to mention seperating the chaff from the wheat among them or reaching a consensus between players and DM on what is fair/ needed in the game) is extremely limited compared to official releases.