Enterprise does seem to get more favorable retrospective reviews these days. Some fans who initially didn't get into the show, maybe due to franchise fatigue at the time, or maybe people that just soured on Berman over the years, have since gone back and find things they did like about the show later (of course, not everybody, it's just of all the Berman era shows, this is the one that seems to get more favorable retrospective reviews these days compared to its initial release).
In general I always liked Enterprise. I had some concerns when it was first announced. How were they ever going to make it more advanced than today, yet less advanced than the original series? An impossible task it would seem.
Yet, I have to give a lot of kudos to production designer Herman Zimmerman and the various illustrators like Doug Drexler. Somehow they pulled it off. The ship is more futuristic than anything we have today. Yet, there were things that made it clear this was a less advanced relative of the 1701. The designs were more claustrophobic, like the tubular corridors. Sickbay looked more like, well, a navy style sickbay. The transporter was clearly less advanced as was the engine room. Even just the designs of the instrument panels, with a radar-like sweep on the screens, the simple button design, the furniture, the crew quarters. Also the uniforms were more utilitarian.
The episodes for the first 2 seasons I thought ranged from fair to good. But I figured TNG and DS9 in particular took about 2 years to find their sea legs so I stuck with it. There were some memorable episodes, though at times I thought Berman and Braga were still thinking 24th century with some of the episodes, like the episode with the Ferengi. Not an awful episode, but it just seemed too TNG-ish, and it would be 200 years before they would encounter the Ferengi 'officially' so it just seemed too early in the timeline to encounter them. On the other hand, I really enjoyed "Regeneration." Granted that's another 24th century foe, but I thought in that case it actually added to the continuity. They were never named, yet it might provide an in-universe explanation as to how a few people in the Federation had known about them before "Q, Who?".
Season 3 was even better. Star Trek's first run at a season long arc. And there were some really great episodes there, and the crew grew up a lot that year. Season 4 was probably what Enterprise should have been all along. You could really sense the prequel aspects of it there, and I liked the variety of various arcs. Some were 2 episodes, some 3, and some standalones, and occasionally a tie between arcs. It gave them a lot more flexibility to make the stories as long as they needed to be, without having to throw in fluff to fill out an entire season, or having to rush a resolution to fit in a single episode. And one of my favorite Archer episodes was in season 4 with their encounter with the Organians (I forget the name offhand)--though the Organians themselves seemed a bit out of character compared to the original series, Archer's emotional speech to them at the end was gold. If that's what it meant to be advanced he wanted no part in it, or something to that effect. Bakula really shined there. Archer could be uneven during the first 2 seasons, but there was much more improvement in season 3, a lot of growth, and by season 4 he had won me over.
A shame the show was cut when it was. We are left with the relaunch novels that continued the series beyond "Terra Prime," ane while I liked those novels, I would have loved to have seen more on screen.