I can't open games with Battleye, EasyAntiCheat, etc
Are you running an old version? I haven't seen an issue with the latest versions for over a year.
I already deleted process hacker, but it still said I need to close process hacker. The kprocesshacker.sys file also can't be deleted from my computer, is there any way to delete it and completely remove process hacker so that I could open my games?
EAC creates a kernel hook for the DriverEntry of our kernel driver which likely prevented the driver from unloading when you uninstalled. You will need to reboot your machine to remove their hooks and fix the issue.