The one time I got a prebuilt desktop for myself it was an HP Omen. Terrible decision.
Single unit radiator that struggled to cope with the CPU under any load, custom case so a larger rad AIO won’t fit, buy a new case.
Usb controllers overwhelmed while streaming and gaming so bought a controller card. Nope, there is only one slot on the mobo and that’s for graphics. (Yes, I should have checked first)
Useless bloatware always crashing and popping up over screen. Changes made to windows registry mean sounds fade in if no sound was played for a while (including alerts or memes on stream so you only hear the last part)