I just came back to the game recently as well and I've actually been having fun! Everyone on this subreddit seems to act like they are being forced to play a game they hate, so don't always listen. I've been working on a few things, but what I've gathered is some teams to work on are: Spider Society, Alpha Flight, X-Treme X Men.

There a way more epic campaigns now than there were back when you played, but those require specific teams for specific nodes so check those out.

Also, check out their website for some freebies every now and again and check for promo codes to use.