OK, up to this point I didn't care enough to comment, but now we're onto Season 3 it is at least worth talking about!
I'm sorry.
Not your fault!

I simply don't much care for the first couple of seasons and I didn't want to show up just to complain about everything!
I agree that
Proving Ground is the turning point of the season. Bringing in Shran and the Andorians spiced things up nicely. Then you get
Stratagem, which is a clever story and does great things with Degra and now the season's up and running. As for the others:
Harbinger - not great, but I actually found the crew interactions kind of fun.
Doctor's Orders - I thought this was pretty awful.
Hatchery - flawed, but fairly entertaining.
Azati Prime - good, though not as interesting as the next two.
Damage - excellent, very dark and compelling.
The Forgotten - just as good - one of the show's most affecting episodes.
E2 - not bad, but not all it could have been.
The Council - decent, but the Xindi politics scenes don't really work for me.
Countdown - excellent. The stuff with Reed was especially good.
Zero Hour - OK, but there's a definite drop-off in the writing quality after the last episode. Feels like a generic action piece. Silly ending as well.
Storm Front - I guess this is only there to tie up a story arc they probably shouldn't have started in the first place. Not very good and I just wanted to get through it so I could get to Season 4 proper.
Overall, as someone who was very underwhelmed by Seasons 1 and 2, I'd say Season 3 was a definite improvement. It wasn't consistent and I'll never really love Enterprise or its characters, but there were definitely more good episodes than before and some were genuinely excellent. I agree that
Azati Prime-Damage-The Forgotten is the best trilogy they ever did. Overall, this is my favourite season of Enterprise. It brought the characters to life better than the other years, I thought.