Yeah...
Sometimes on these boards guys want quitting porn to be a magic elixir. Don't get me wrong, porn addiction is the root of many, many problems. But, addictions often exist because we're self medicating other issues. I'd think of it this way: instead of going to a doctor and getting a prescription that would help you manage your anger/temper, you used porn as your "medication". Quitting any med, especially abruptly, has consequences. As you're coming off that med, you're having those symptoms return. Going back on that "med" isn't an option, so what is the new treatment going to be? I'm not a therapist so I don't know. You probably know the options better than I do, but exploring those will give you a pro-active way of dealing with it besides white knuckling it and eventually relapsing. Sometimes just looking up "how to deal with anger/temper issues" on google or YouTube can be really fruitful.
Addiction recovery is quite a journey, and one where we learn an awful lot about ourselves that we never knew. It can also be very rewarding. Good luck!