If they were planning on bringing him back…they had to have liked something he was doing.
Gotta blame the poor performance on the carousel of mid they had at QB
He was incapable of adjusting to the roster. The O-line was ravaged by injuries and he kept trying the same thing.
Also he's trying to fit a square peg into a round home with the QB. I'm not saying he's all that but Zach Wilson is a better QB on the run than in the pocket, and he's running a west coast offense designed to keep the QB in the pocket. In modern football you need to adjust your offense to the abilities of your quarterback to succeed. He was incapable of that so they're gonna let him leave.
He was supposed to have a veteran coach to work with him. Sadly Greg Knapp was killed right before training camp in 2021 so he never got to work with him and they never replaced him. Salah even said he was going to bring in a veteran coach to work under him this year, now they'll just bring in a veteran coach to be the coordinator.