The NHL doesn't need saving. The owners and players are extremely happy with what Bettman has done for them (increased revenues, increased profits, increased exposure).
The NHL has outpaced both the NBA and MLB in revenue growth and television audience in the past 15 years.
Bettman (like Selig and Stern) is pretty much the league's spokesperson. He is the talking head for 30 other men who would rather not get booed out of their own arenas. He doesn't set the rules, nor does he get to vote on them (unless there's a tie).
He wanted the league to accept the ESPN contract, the 30 owners said no.
People get on him because he was the commissioner during the lockouts, well guess what, if you were the commissioner, there still would have been a lockout......or else you would be out of a job. The league is a business and needs to be run like a business, and not all customers are going to get what they want.
I've met the guy, and I don't really like him all that much (he's very condescending in my opinion) but I also understand how the system works, and how little power he has (and I know who has the power).
So, what can you do about it? Buy a hockey team, and convince the other 29 owners that the 430% revenue increases they have seen since 1993 are all wrong and that there are others who could do a better job.
Between 1986 and 1993, Gary Bettman increased NBA revenues by 211% (revenue growth has slowed since he left)e, their TV audience by 361% (it's fallen since he left), and was named Street and Smith's Sports Businessman of the year 3x. Since 1993, Gary Bettman has increased NHL revenues by 430%, he's increased player salaries by 246%, television revenue has doubled since Ziegler left office, and the television audience has increased 3.6% in the US, and 13.5% in Canada. He was also named Street and Smith's Sports businessman of the year twice more (including the year after the lockout).
He's done what the owners have asked him to do. And as long as he does what THEY want, his job security is pretty good.
The other thing people need to look at is that John Ziegler did a lousy job, but because people only saw him once a year (Cup Presentation), nobody really knew what was going on. Bettman goes out of his way to make sure the fans know what is going on. Good or Bad.