Another bit of advice I can suggest, being a semi-n00b myself (playing for 5 weeks now), is if you die and decide to spectate, offer advice to someone you might see not doing things well or right.
For example, I died about halfway through a match earlier today, and as usual, decided to spectate to see what I might be able to learn from better players (I'm still T5, but edging closer to T4). Noticed a guy in a Stalker (I think) loaded with LRMs and MLs. He was shooting at targets with LRMs, but wasn't locking them up (pressing R) and getting the missile lock. I got on the comms and told him what to do, but by that time, he had something like 5 mechs on top of him.
Point is, even being a n00b, you can offer advice that could probably help others even more n00b than you. That's the start of good teamwork.
If they ignore you, or mouth off to you, then to hell with them and move on. They'll either eventually learn the hard way and get better (and maybe start appreciating teamwork), or they'll ragequit the game for good, sparing the rest of us from their ignorance. I really hope I helped that guy out, and maybe his gameplay has improved.
Edit: When I first started playing, I listened and heeded every bit of chatter I could hear. It really helped me out of a couple of potential binds, and I've learned a lot just listening and watching when spectating. I'm still not all that great, but I'm definitely improving.
Although, you might notice the "Bridesmaid" under my generic userpic. I got that title for the "Seriously?!" achievement (get highest damage in a single match with 0 kills). I was tickled pink when that popped up after a match I played today. I've always tried to play for the team and not for myself, so lots of damage but no kills still helps, because it's that much LESS damage your teammates have to dish out to get a kill.
Edited by MaxxQ, 05 March 2017 - 10:20 PM.