I want to beat a client to death
I hope you're joking, why do you want to beat them to death?
Because him and I don't get along and I can't stand him anymore!
You shouldn't be looking to beat people to death. If you think that you have an issue with someone then you should look to either talk it out with them or leave the situation yourself.
I don't like talking. Especially not with him. I'll just kill him instead.
Please seek help immediately if you are feeling this way. Wanting to kill someone is horrible and you should stop right now.