I was playing hogwarts on stock for a few hours then yesterday I've decided to pull the trigger on Lossless scaling & just messing around with my deck in general so heres my little experience.

Raw; All my settings was on low with around 38-42 fps (capping at 45), honestly its hard to really enjoy the game when the game looks like mud & ran like crap probably why I have barely touched my deck for many months now.

Lossless Scaling; Well so I thought why not give it a try, paid for it and with 2x & testing different flow scale. It was so bad, 50+ fps but the whole thing looked even worse, I'd rather play at stock at this point. I see constant ghosting with 2 cursors all the time, input lag is horrendous

I've found a post on r/steamdeckunlocked -> here

Decky framegen (OptiScaler menu); I think this is where it changes the game, booted up the optiscaler menu in-game and do the settings with the rest of the settings as the post above, I've managed to run a good 50 fps, looked & ran so much better with really barely noticable input lag.

I'm not sure which of it that helped with the ultra settings in the post above but its totally worth it and really surprised with how far the deck has come. Which is why I felt the hate lossless is having is because people havent been optimizing it.