New UI stuck after trying it in Preview – now affects base game with lag and missing worlds

when the first preview version of minecraft 1.21.6 came I played it on ps5, at first i noticed a “New UI” button so I tried to press it, then the new UI was setted, it was so laggy that i immediatly press “Old UI” so it wasn’t laggy anymore, but when I went back to base minecraft 1.21.5 there was the new UI and it was also laggy so I tried to unistall it, but nothing appened, I tried to go back to the preview and change the UI by there but it was the same, so now I have both minecraft (1.21.5 and preview) with the new UI, it isn’t good, when I open minecraft I have to wait 30 seconds ‘cause if i press play the game crashes, after that 30 seconds the game needs other 50/60 seconds for stabilizing at more than 4fps (it’s not my tipe error, there ARE 4 fps whit this UI), and in conclusion this UI make me not seeing old worlds from ps4 version, but with the old UI there were all ps4 version worlds (but only in ps4 version there were legacy worlds). I hope this will be useful to mojang to understand how much things they are hiding and how much minecraft new UI is worse.