Actually there was never really any shark to jump. This show has always been sketchy. Some episodes better than others but it's not like it suffered some huge drop in quality over the years.
Oddly enough..."Happy Days" had been crappy for a few seasons before the shark episode.
Season 1 was incredible. Maybe I'm too fondly remembering it but the first episode - seeing that kind of cinematic production on TV. So much promise, getting to the CDC, finding out the truth, first characters wrestling with 'do I really want to live in this kind of world'... Granted I never, and still haven't, read the comics. But IMO there's barely enough meat on the 'will humans retain their humanity' angle for even the best written and best acted version of this. But the constant changing of rules and the very mediocre to bad acting by most, with the rinse-and-repeat plot line (wander, find new safety, new place isn't what they hoped, should we stay or take over, oh #### a horde/illness/other group, nowhere is safe!!!!!!, wander) is just too much.But... I'll probably keep watching because #### it I've gotten this far.