Turned off TAA, it doesn't help.
Here are screenshots from steam. It looks like objects near the camera look acceptable, but the further away, the worse. Even though the resolution is like 3000 by 3000 in steamVR(which is more than 200%). It turns out that the SteamVR settings affects the game(kinda), but only when you restart the game. The other settings are on ultra. And even 8xmsaa doesn't save the situation, pixels looks kind of jerky.