Have you ever watched an episode of Enterprise, Nene?
It's not proven that prequels don't work for Trek. Most people attribute Enterprise's failure to Berman and Braga, and not the era. B&B purposely attempted to distance it from the franchise by leaving Star Trek out of the title for the first two seasons, immediately alienating many fans. B&B also didn't go back to Trek's roots, instead using their tired TNG formula, which hasn't had an original idea since season 7 of TNG.
The problem was further compounded by Enterprise screening on UPN, which wasn't in every market. I didn't get to see the show until Sunday nights, and that was often bumped about because of the World Series or some other major sports event. Schedule uncertainty like that kills viewership like nothing else (ask Joss Whedon).
The fourth season (with the conspicuous exception of Berman's abomination of a series finale) is widely considered the best and most popular of the series, and that was headed by Manny Coto, with little (if any) input from B&B. Had Paramount decided to continue forward, we would have likely seen Enterprise flourish like TNG and DS9 did in their last 3-4 seasons.
Just because you don't think a Trek prequel can be done doesn't make it so.
Davy Jones
"Frightened? My dear, you are looking at a man who has laughed in the face of death, sneered at doom, and chuckled at catastrophe! I was petrified."
-- The Wizard of Oz