iphone completely bugging out.

today my iphone 14 pro max (unsure of the software version, sorry. but i think its not really necessary in this case.) started randomly turning off. like going black and the apple logo appearing. after resetting by itself it sometimes made the battery count increase. now its nighttime and the colors started rapidly shifting and everything on screen has a green-blue tint. goes fully blue when i turn down brightness fully. i would show a photo but im scared of charging if as of now, since the latter symptoms appeared after doing so. i also wanted to check the version but the screen started flashing rapidly changing the brightness. i tried force resets, letting it alone to cool down, nothing worked. (its also worth noting that its gets pretty hot. the battery capacity was at 81% iirc.) please any advice welcome this is driving me mad. i tried updating to the latest version but my phone just randomly reset mid update and started glowing bright green again. is it just ready to go into the trash?