Shaman just gets mad when people don't do what he says.
Admittedly his strategy often is the best way to win in a given situation.
But, playing ZK is like herding cats. You can sort of suggest what to do and if you are lucky somebody helps out. The very best players coordinate automatically because they are vets of 1000's of battles and they know how the units work with each other. Most players don't coordinate and more or less do their own thing hopefully leading to a win.
Today I had racketeers that were turning the tide of a battle, and the units I was engaging were out of radar range. Having no cons there I asked another player 3 times to build radar to help me target. He ignored me. So what I did was withdraw and angage another flank that needed help. 5 minutes later he was overrun.
That's ZK and that's how players learn to work with each other.
I feel for Shaman but having smaller games (which I prefer tbh) is not going to help his aggravation. Rather he's going to get bigger lobsters as team mates cause he's high level and he's going to rage more as he has to carry them.
Developing a thick skin, a zen attitude and working with the high rankers on a team works for me.