A first round bust is a first round bust, if you ask me. The fact that he partied and wasted his opportunities doesn't make a 22nd overall pick worse than a top 10 bust. You don't think those other guys from decades past partied and squandered their chances just the same as Johnny did? Of course they did. The Browns are idiots for thinking he would be a good QB, partier or not. He was never all that accurate in college. He doesn't have the size to be able to take the pounding of being a run-heavy QB at the NFL level, and that was always his game in college. Dude should've been a 4th rounder, just based on his skillset.
As for all-time NFL busts, to me the biggest busts are when a team picks the only bad pick out of the top 5 players taken in that draft as the Packers did in 1989. Literally 4 out of the top 5 were HOFers, first ballot, no doubt HOFers, and you drafted a steroided out freak of a bust who flamed out in like 3 or 4 years. The Mandarich bust (and dude was all over Sports Illustrated getting hyped up at the time) is way underrated.
1. Troy Aikman - Dallas
2. Tony Mandarich - Green Bay
3. Barry Sanders - Detroit
4. Derrick Thomas - Kansas City
5. Deion Sanders - Atlanta
Or how about when you're deciding between two players high in the draft at the same position. Leaf was a bust, no doubt about it, but San Diego didn't exactly have the chance to take Manning. Or how about the Buccaneers in 1990. They needed LB. They were picking top 5 in the draft with a decision to make on two top 5 caliber LBs. Here's how they handled that one.
4. Keith McCants - Tampa Bay (total bust. Out of the league within 4 years.)
5. Junior Seau - San Diego (HOFer)
There have been so many worse busts than Manziel. These are only 2 out of numerous others. You could basically look at the top 5 picks every year from 1989-1999 and find at least one every year who was a total bust much worse than Manziel.