Thank you so much!!! I'm really glad you enjoyed the game and had a good time, now to be honest its really easy to beat the game when you are the only one you just spam counter, also you level up when you kill your allies. But! And if you don't want to get spoiler reply the game when you kill your friends.
Spoiler!: although the out of control is your friends, there is a plot twist when you solo the game and beat it and I won't share it because i think it's pretty neat.