I get your point but I really struggle to understand how you can still think it that way in 2020.
I think the community has done anything possible, countless times, without any support from Valve whatsoever, for years and years now.
Nothing has changed. There can't be anything more that a community alone can do at this point.
Valve does not want to make TF2 an esport, it was never in their plans, they make enough money off hats n keys n cosmetics already.
TF2 was never meant to be an esport. When it released, they had no idea how huge the skill ceiling actually would have turned out to be. It was always sold like a hat-simulator or whatever, never as something competitive.
Hell, the dev-team is probably composed by 2 members at best. And it still runs on Source 1 (f)
Like it or not, that's just the reality of things, and I wish I could see it the same way as you do, but at this point I feel like it's just delusional.
EDIT: just wanted to add that if the solution to this stagnant """relationship""" with Valve is to shift towards their idea of competitive, with no class limits, no weapons banlist ecc. don't count on me. I love 6s cause they take away all the unnecessary bullshit that should not be in a competitive game, but I get it just gets down to a matter of taste in this case.