It's both sad and a cautionary tale for the rest (i.e., non-Alabama portion) of the CFB world.
It's sad because it's such a waste of God-given athletic talent. That's mainly because of Manziel's own personal weaknesses. But a lot of people bear some responsibility in enabling him to do that. Starting with his parents, especially his dad, who was a spoiled obnoxious brat who (no surprise) raised a spoiled obnoxious brat. Only difference was, JFF had infinitely more athletic ability than the old man, and therefore more to eventually send down the toilet. Add fans, Sumlin, the aTm administration, and goodness knows how many others who covered for him when he was drunk / stoned / holed up with a woman / just hung over.
It says volumes when that bastion of upstanding moral righteousness, Drew Rosenhaus, fires Manziel after less than 90 days as his agent. Everybody he (Manziel) once knew now publicly say they're worried. They're not even trying to hide it any more. For a guy who has never been told no or experienced an enforced limit in his life, that's ominous.
It's a cautionary tale because Johnny Manziel turned 23 years old in December. The chances of him seeing 30 are slim. The chances of him seeing 30 if he doesn't clean up his act are zero. Shoot, if he doesn't clean up, he might not see 25.
Johnny Manziel made low-to-mid eight figures off of one game in Tuscaloosa during his redshirt freshman year in 2012. It might be his undoing. He has done nothing of consequence since, and gives every indication of flushing an opportunity that literally billions of people would love to have.