So I adopted the Cardinals as my pro team years ago when I was living in Arizona and I had sworn I'd never follow the NFL again after the Falcs lost to the Broncos...

That was a shitty Arizona team he played on his rookie year. Remember, Carson Palmer and QB whisperer Bruce Arians had retired (Arians for only a a year tho) after the 2018 season so there was a new coach and in addition to Palmer retiring the entire QB room was cleaned out. The GM was suspended for 5 weeks during the off season because of a DUI (AZ's draft class reflected that), David Johnson was coming off of a season ending injury in 2017 during week 1, and the plan was for Rosen to sit behind Sam Bradford that season but Bradford ended up being so bad he got benched in Week 3.

The Cards's HC from that season hasn't been a head coach at any level since and is now the DC at Mizzou. The OC hasn't had a job in football since that season.

The rest is history with Kliff Kingsbury being brought in and he making sure Kyler Murray was his QB. Rosen was sent packing. Seems like a similar situation happened to Rosen in Miami.

In summary, I don't think he's ever gotten a fair shot. Being thrust into starting after the big veteran FA QB shits the bed then being delt off twice because of a new HC isn't exactly a hell of a way to start a career.