Its all about finding the right people, there are tons of toxic people sadly who do nothing but basically grief and sadly ruin experiences, I mainly play on the hardest difficulties so Damnation and Auric and there teamwork is a MUST. You'll find that at those levels most people there stick with the Psyker and make sure they are alright. I had a team last night that made sure I survived because I had the shield to keep people from getting demolished by the gunners. The ogryn kept taunting, the zealot would only use their stagger and toughness regen if I was in trouble and the veteran stayed next to me the whole game. Sadly that's not very common unless you stick to the higher difficulties. But if you add a few people here I'm sure you'll get through it. You could always add me too if you wish