In a contest between a terrible movie that was a another
painful re-concluding of TNG vs a forgettable but entertaining romp, I'd sooner not spend too much time on either.
But if I had to choose, I feel my fan "cred" would actually be saved a bit by going with the one that was at least entertaining without hurting much, rather than the abomination.
It's like choosing between watching Leave it to Beaver, or getting hit by a sock full of batteries. I'd go with the beaver and feel no shame.