There's a lot to criticize Pickett for, but how he plays at the end of games tells me there is something there.
People are way too quick to criticize Pickett. He has his flaws, but what QB in the NFL is going to have success in this system with how screwed up the rest of the offense is? I think you can extend that same line of thought to Harris as well.
The team has a downright dunce of an OC and a bad offensive line, which is a major factor in the running game to be non-existent. That puts a ton of extra pressure on Pickett to succeed, when he's realistically just not good enough to be able to mask the rest of the issues.
I honestly wish Pickett would have been drafted to someone like New Orleans because he would be in a substantially better position to succeed on the Saints than he is on the Steelers. Not only are the Steelers a mess offensively, but Pickett also has the extra crap that comes from him playing at Pitt.