Yeah, from the very start, Wade was just a guy to keep the seat warm. That's why Jerry almost named Garrett HC back in 2007 but decided that was too big a jump to take. That's why he rejected Norv after almost hiring him -- he wanted Jason to have total control of the offense and Norv wouldn't go for that.
I don't think Wade realized that, though. I remember one time early on he said something along the lines of, "Jerry would let me fire Jason if I wanted to" and then joked, "At least I think so." And then when Wade was canned, some reporter asked Jerry about it and Jerry said, "No, that would not have happened. It just wouldn't have happened." Meaning Jason was Jerry's HC in waiting all along.
It's also why Jason had no loyalty to Wade. He didn't work for him, he worked for Jerry. I started hating Garrett back then when he wouldn't own up to any mistakes on offense, and when the Garrett fans in the media started blaming even the offense on Wade (he won't let them hit enough, he's not disciplinarian enough, Jason wants to coach them harder but doesn't out of respect for Wade etc.), he never ever had his head coach's back.
But to him, why should he? He worked for Jerry, not Wade. And he knew that any and all crap Wade got only helped him because the job was basically promised to him.
The whole thing is an absolute clusterfuck. Sometimes I feel like Jerry made a bet with someone like the old men in Trading Places. Jerry thought he could take anyone and make them into a head coach. Which is exactly what Jerry did think, because he's never respected the position of head coach. He's always thought the players were everything and the coach was just a glorified administrative assistant.
He needs to get out that one dollar bill and admit he was wrong, but of course that won't happen.