what about.........
the server browser
have you looked at the community servers available lately? here's a rundown of at least 95% of them, every time I check for myself, in order of popularity:
1. idle/achievement server
2. trade server
3. wacky gamemode that belongs in garry's mod
(these first 3 alone make up an astoundingly
massive chunk of populated servers, the sheer number of them honestly stuns me every time I sift through the browser)
4. 24/7 one map
5. good qualities but unplayable latency
6. less than 4 players
the only servers running "normal" maps with rotation seem to be
these ones (thank you Uncle Dane), along with a couple scattered communities like Crit Sandvich and servers run by TF2 content creators