I have the same problem with my Note 20 Ultra.
All my icons are blurry ...like they're low resolution. I've tried to chnage the wallpeper with a brighter one, restarted, clear the cache, disable night mode. nothing seems to fix it. Also the performance drop significantly . I think the only option that remains is to reset to factory mode... wich is awful. If anyone has an idea with what else I could try?
My A52 crashes 4-5 times a day for no reason since I installed UI4.
I also was quite angry about the fact that the update quietly installed facebook.
A big step back indeed 😞.
How can I rollback to UI3?