I try not to speak for others.. but his rookie season we had hope. It was cautious optimism. He flashed at times.
Sophmore year, we proclaimed he arrived, it was lit.
3rd season, most understood he was coming off an awful injury in less than 12 months time. But there was a little worry.
4th season, there is no excuse and more people started thinking he either fooled us or that he still was bothered by injuries/losing QB coach and OC.
Now, his approval rating is worse than Trump's. A large majority, even some of the staunchest supporters, who wait until its beyond obvious, have agreed that he is not that guy.