Griffin lost that fire after the Jackson win, people in his camp were saying that Forrest changed after that. Like he resented the attention and pressure he got as a champion, and the chase for the belt really brought the best out in him. The Evans fight just kinda sealed the deal for Griffin I guess, he was doing real well before the TD too in that fight. He didn't seem bummed to lose that much, just mocked his own "lazy guard".
A mental work ethic, injuries, and a mental weakness and lack of belief in himself really isn't doing him any favours. Sucks as he's my favourite fighter