Fuck this game.
There's few games that have made me turn it off in frustration but this is near the top of the pile.
Playing solo the game slowly but surely throws one dick move at you after another as the game progresses. 4 Infected at once might be manageable in a group but solo it's a kick in the balls because the kick isn't fast enough to keep them all stunned, or even to stun enough to let you reliably thin them out, and half the time the hit detection is so bad enemies clip right through your kick and attack while passing through you. By the time you've realised what happened you've died and re-spawned in the middle of the group.
That whole last section is a massive pain in the arse with all the scripted events throwing endless streams of Infected at you and the last boss is a shitheel if ever there was one if you're solo. "Oh you're winning? Let me open these doors to trigger an infinite stream of armed Infected on fire to fuck up your day. Oh and you need to shimmy past a Thug type in a small space barely wider then it is."
Was tempted to go back and try out the other characters but I'll be happy to uninstall this and never see it again.