Redeye's opinion of TF2 has never really been a secret, especially considering he used to be involved in iSeries. His opinions on the game can be seen in the i46 grand finals as well as the Ready Up documentary, there are also other major names in esports like Slasher who have expressed their support for the competitive community of Team Fortress 2. Unfortunately having a bunch of famous esports icons saying "well this game shoulda been given a chance" is a very long call from "This game has an active chance at growing into something massive." or having actual developers touch the game outside of a handful of game-breaking bugs in the last 3 years.
Valve's silence the past few years has been astoundingly bad, even compared to how they used to operate. I remember ~2016 when they wanted to start talking way more with the community; there were many figureheads that visited the Bellevue HQ, there were explanations in blog posts about future plans and reasoning for current changes; It really began to feel like they cared. Then the shitstorm that was the competitive beta launched, released fully a few months later with no changes outside of cosmetic changes, and soon after that and the following Jungle Inferno update a year later they turned into the totally mute company we know today.
Anyone with hope with Valve, while I do respect that there was a time where there really seemed like there was a chance, that time came and went without any real support from the developers. If competitive TF2 is more than a passion project or stepping stone and you have genuine hope that there will be any updates or developer support for the competitive game I really hate to be the one that rains on your parade but it just isn't happening. I think there's a half decent chance that the game could still grow community-side and function better on third party support than it does currently, even without major esports players such as ESL/ESEA/FACEIT, but it'll be a decent amount of time, money, and effort sunk in before that happens.