Compared to other companies, Valve let the community use alternative community servers. Even if Valve does not care about the game anymore (sigh, one of may all time favorites), it's possible to maintain community servers. This is something any other game wish to had, without hacking the system; it's just part of the game. And people can even use modded communities and there exist some really cool stuff (admittedly I never tried them, I would play the game if it didn't have the bot problem).

• I mean look at the most played servers list, look at that: https://tf2-servers.com/servers/players/
• A complete dedicated community with its own list of servers: https://teamwork.tf/community/customserverlists

But please stop review bombing other games with the cry to fix TF2. Those reviewers should get a review ban for misusing the review system.