Qbert seems pointless after playing it once for the novelty... I hated Rescue 911 back in the day but it seems to have good reviews on ipdb so I may need to give it another look... Time Warp and Disco Fever with those ridiculous banana flippers are nearly unplayable... Sega Star Wars is a disaster...
Probably worse ones than these. Sega made some bad games, so did Premier. The worst Stern is probably Striker, worst Williams Popeye but they are still ok.