An average episode of Enterprise was much better than an average episode of any other series of Trek.
People complain about continuity with other series, but all are guilty of that:
TOS - UESPA? Starfleet? What's the diff?
TNG - Klingons are all about honor? Tell that to the ones on TOS
DS9 - Trills look different to the ones in TNG
Voyager - Faster than Warp 10? (Actually, that's consistent with TOS, so which series is right?)
People complain about the time travel: all TNG era series used time travel in the finale except DS9. They made a whole TOS crew movie about time travel
People complain about T'Pol and her lack of clothing: Please watch TOS again people.
Sure, bad ENT is really bad. But bad Voyager is way worse. Spock's Brain is a terrible episode. How many times did Wesley save the ship in TNG? How many "The Chief gets his brain fucked" episodes were there in DS9?
I voted for Enterprise because it was pretty good most of the time. Which is better than the rest of the shows.