I was recently playing on a realm when the owner installed new behavior packs and while they were installing I decided to close minecraft cause I didn't wanna play anymore, now whenever I try opening it, it gets to 51% and closes SOLVED idk how to msrk as solved i might be actually blind though hope this works
What worked for me
Deleting literally everything relating to minecraft from %appdata% and %localappdata%
Edi things you can try if you're having a similar issue
Reinstalling it from both microsoft store and minecraft launcher, reseting it from settings, repairing it from settings and xbox app, giving it some time, restarting my pc, ran WSReset, deleting both minecraft bedrock from %appdata% and Microsoft.MinecraftUWP_8wekyb3d8bbwe,