I just don't think he is any good. That's my thoughts of him as a player. Just one mans opinion. I can't help that a lot of people share my views. He doesn't protect the football and isn't a good enough passer to turn the ball over as much as he does. He's been criticized heavily by analysts who say he stairs down receivers and I think there is a lot of merit to those claims. He makes the same mistakes over and over and over again. There has been no progression from him as a player. He was the product of a very good football team. A good defense, strong running game, and above average skill players. It's not a shock that once the team around him started to get a little weaker Mark's play did as well. A good QB can elevate players around him and get the best out of them. Mark has never done that. He was asked not to lose games early on in his career and for the most part he did his job, when they tried to turn him loose in 2011 he fell flat on his face. Rex and the FO knew this and we started to hear about how the Jets were going to be a "ground and pound" team again, Tebow was brought in and the rest is history. He is simply not a guy you build a team around. He has not proved he is capable of being the centerpiece of any team. He's proved that with a very good defense, a strong running game, and above average skill position play he can win you anywhere from 8-11 games.
I want a QB who is capable of putting a team on his back and carrying them. When I watch Tannehill, Wilson, Luck, Stafford, Cam, Kaepernick, all these QB's that came in the league at the same time or later that have all passed him I see QB's who have the potential to do that or who at the very least know how to play the position a lot better then Mark does. I don't see it in Mark. You might say guys like Wilson and Tannehill aren't in the same league as guys like Luck and Cam but they know how to play the position. Tannehill has shown to be a very good passer, if he could figure out how to throw the deep ball he would elevate to another level. I'm not saying he's great, right now his overall play is a little better then average IMO. But he is trending upward. He's getting better every year. Mark wasn't. Tannehill's problem is also coaching and the front office. He doesn't have a ton of talent to work with. Wallace is average, Hartline is ok.
Wilson doesn't have a ton of talent outside of Lynch to work with but he knows how to protect the football, bide his time, use his feet when needed, and eventually make the big play.
Insanity is doing the same thing over and over again and expecting a different result. Mark's not a kid anymore. He's played 4 complete seasons in the league. He's won 4 playoff games yes, and played well in both championship games. But that doesn't make him a good QB. You have to look at the big picture. There is way more bad then good. He's to inconsistent. He will have a good game one week and then turn around the next week and turn the ball over 4 times. Good QB's are consistent. Mark simply isn't.