CanFo works as the marketing manager for TT eSports. Two years of community management at ETF2L probably played a part.

I'm not sure what the provocateurs are trying to accomplish at this point. Harass the two founders to the point where they ask themselves "Why am I wasting time on a community project that goes out of its way to make me feel miserable?"

I sincerely doubt that either of the two admins depends on TF2C for their livelihood. I think at this point it's clear you can't you can't convince them their behaviour is wrong, but you sure can convince them to stop spending time and money on a community project that is openly hostile towards them.

If TF2C shuts down, robbing the TF2 community of the only free-access matchmaking service it currently has, will you consider that a victory? Will you be proud of it afterwards?

With the rumors of TF2 Matchmaking launching at the end of the Gun Mettle update (in 3 months), it may be worthwhile to wait and see what Valve comes up with. You'd want a TF2Center replacement to offer features that make it worth using over the Valve one, and it's easier to design features before you start writing code.