this is true to a degree, but he was also moved to the 3rd stringer in SF and they brought in Darnold. if they didn't have patience and wanted to move forward, then why demote him to 3rd string and so quickly give up after having paid such a steep price to get him.
and then in Dallas, if he had any level of NFL talent, then he would have beaten out Rush this season. the fact that they didn't have confidence in even doing that, should tell us a lot. I mean, we were 3-5 and really bad, then why not put in Lance, and go with Rush?
the thing that intrigues people is always the same, he is athletic and can wow you with the athleticism. running ability. arm strength. but that's only 40% of NFL QB. how he understands the game, reads defenses, reacts, accuracy and where to go with the throws, etc. is 60% of it (give or take a few % points based on opinion). he hasn't shown any of the latter, thus the infatuation with Olympic ability is no longer reason to keep him.
he also has shown his ceiling is not that high. at best, he is a Geno smith. is that good enough reason to invest several years, time and money to end up with Geno smith and then complain we need better QB?
btw, I haven't seen him be much better. he looks the same as he did 3 years ago.