They started out as you say. I didn't care for the pilot, but it wasn't because it didn't place itself in the timeframe it was supposed to be in. The problem was that their process for episode scripting was pretty much exactly the same as Voyager, and they inherited the same apparent lack of care that that show had, too - which now extended to whether or not things made sense in canon in the time period they were supposed to be in. Phase pistols became phasers, holodecks showed up, and suddenly the Romulans were themselves more or less exactly as they were from the 24th century instead of the cool mysterious foe for the later seasons that they should have been. And they could have excused a lot of it by making a lot more of the Temporal Cold War that they established was going on - but they really just didn't, preferring an episode style with what still amounted to a reset switch at the end of each one. Which worked fine for TNG, but TV had moved on, and DS9 had already had more and better story arcs than Enterprise, so they should have known better.
I agree with most of these points. Even if it's a prequel, then really didn't take advantage of exploring some really interesting facets of Trek lore in the prequel setting. Phase pistols and holodecks are just annoying call backs to TNG, rather than to TOS.
Also, I find most of the characters rather annoying, so they don't endear themselves to me in a meaningful way that makes it enjoyable.