The 32bit libtcmalloc_minimal.so.4 that all Source 1 games ship with needs to be updated. You can symlink it to your system’s version to get TF2 running again. It’s usually only a matter of time before it starts to effect more downstream distros.
The other problem I have with TF2 is queueing for casual just stops for no discernable reason or error every time, even if I’m not the party host. But then I come back later and it works again? Only real solution I’ve found is to have my friends queue without me and then join after they’ve found a match.