I did a complete rewatch of this series starting late Monday night, and I am now on Season 4 episode 6. Watching this now seems fresh and new, because I have not watched any of the other Star Trek series recently. I was able to take this from a standpoint outside of the Trek universe, and it really was not all that bad.
This show suffers from it's Star Trek affiliation. If it had not been called Star Trek, it would have made a much better standalone show IMO. The writers obviously felt bound by staying within the Star Trek universe, considering how much they deviated from canon and how many new things they haphazardly introduced.
I counted no less than four entirely new races introduced in this show, none of which appear in the later series. If there had been no later series or connection to later Trek shows, then the irritation of seeing them would not be there. Also, they had Captain Jonathan Archer being pivotal in establishing the Federation. I do not think this is a violation of Trek canon, but the Xindi are what gives him his cred and they are absent in the future timelines. The TOS timeline gets fuzzy because of Enterprise. The Vulcans in this show are emotional and devious, unlike the logical and stoic Spock. If they had been outside of Trek, there would be no other Vulcans to compare them to (and make them look bad).
Overall, I actually do like this show now.
Seasons 3 and 4 were serialized, so you could not really miss an episode and not miss part of the story. If you have missed this show, it might be worth watching now, since "thinking Trek" is now dead. Interesting stories are being told, and the Xindi arc of Season 3 is very interesting, if utterly trampling on Trek canon.