Why has JJ Abrams set out to destroy Star Trek?

He could have done anything he wanted with the franchise and he chooses to go back in time with a timeline that doesn't work. Young Kirk and Spock, Sulu and Chekov, etc... When Kirk was in the academy Chekov was in diapers. This movie is going to be a disaster and possibly end the franchise.
Update: When I say the time line doesn't work, I mean that the crew were all different ages and would not have been at the academy together. The storyline is implausible. They should have gone forward in time. The Enterprise-J or something. Could have had some next gen continuity with Data in command, etc...
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