watch homescreen glitching

it's been 2-3days, my watch 7 seems to glitch only on the homescreen, anything on the homescreen doesnt work (only lagging and glitching, literally cant do anything) but thru google assistant i can summon other apps which seems to work just fine even when typing the pin password (seamless login) but once u get to the homescreen, the whole screen just glitches again.

this is after around 10 resets + wipe cache partition + factory reset from boot + set up as new watch, no backups, no downloaded apps, just default watch face + i even handed it to the samsung service center (i think they only tried to reinstall the os)

after each attempts, it would work for like a few minutes to maybe a few hours but it eventually goes back to glitching

the samsung service center i went to, only advised to have the board (im guessing the motherboard) be replaced which is not cheap, i'd probably be better off buying a new watch but it seems such a waste since only the homescreen is tweaking