In my experience, M0 and +2s are really the worst to pug currently, especially this ID with the bullion quest. It gets better the higher you go in keys, though. If you take into account item level, current rating, S3 rating and timed keys in the key range you’re in when you invite players, the chance to get great people is really high.
I’ve not had duds in my +8-10 pugs yet (haven’t gone past 10 this season), all the frustrating experiences were in 2s, both with my healer (main) and my hunter (who now got KSM too, which helps to get into better groups).
I posted a +10 BH earlier today and got two Russian or former USSR bloc country players (I play on a EU realm) that were MDI level of good. I felt carried by these two (tank and dps) and healed less in that dungeon than I did in any +2.
So don’t give up on pugging, just be more mindful of who you invite and whose groups you join. It really does get better in higher keys.