I love Inquisition and until last patch they were ok. But now it takes along time to get ANY Grey Knight units and usually until then the AI is flooding your base. The lack of some versatile melee early game especially vs Tyrannids makes it impossible to win.
Tyrranids. I tries to play vs them with Chaos Space marines, another faction I like, and even Khorne Berserkers could not stop their melee flood of these small but seemingly unkillable units. I have no idea what is wrong with them but they need a nerf.