I would liken watching Enterprise to starting a relationship with a woman
The first two years are a little slow, you don't quite know what to make of each other but then all of a sudden around the third year the sex gets really really good and you realise why you have stuck with her all that time, it's steamy, passionate and filthy, then after a nice long romp and your fourth year together, you realise you have fallen in love, things are almost perfect..... but all of a sudden out of nowhere the b###h donkey punches you in the face, stamps on your balls, robs you blind and runs off with your brother.
I'm just flawed by how utterly disgustingly terrible that ending was.
I could actually cry it was so bad!