I played against a friend, Eldar vs Ork, and I was defeated. One tactic he used would stun/slow my units tremendously. This allowed them to be killed off quickly and even prevented abilities such as Striking Scorpions leap, Macha's spear and the Wraithknight's charge.
Can you please tell me what he did and how to counter this? And how is it balanced that my stun abilities make the opponent invulnerable, but theirs leave me open to damage?