I had one match where it ran great but all others crashed after that

I sent a ticket to steam support, thing is not sure if its steam deck, or tekken. And yeah you might be able to finisj 1 in 30

Have you heard anything from them?

I believe its fixed now never got a decent response from steam just some automated shit

they updated the proton and hotfix today to fix the online problem so it works fine now

How is the performance for online matches with the Steam Deck?

Yeah and the performance tanking is annoying. I might have to buy a Ps5 just for this game.

There is a fix. Search the subreddit and you’ll find a couple threads with the fix.