loading issue is anyone reading this?

the minecraft launcher works fine but when i launch minecraft itself on 1.15.2 it starts to load up then it stops on the last bit of the red loading bar and doesn't load anymore, when i try to get out of the loading screen it always says "java platform not responding" and no matter what i load up on there it always does the same stupid thing, the only solution i found to this was to restart, turn off, or select the sleep option on the pc until i get lucky and it loads up, this is really pissing me off because i can never access minecraft when i want to and i don't want to have to keep restarting my computer multiple times just for it to load. if this isnt' fixed, i might as well just uninstall this trash if i cant even use it