After considering the input from others, working on my anger and attempting to find out what is causing it, I believe I have found the answer.
Back in May, when I relapsed on Pascha, I sincerely regretted my actions and repented heavily. With God's grace, I was able to do NoPorn/NoFap for 98 days. This was a big deal for me because since I started jerking off back in junior high school until now, the longest I've been clean is 18 days (it didn't even break the three-week mark). For years, 90% of the time I relapsed in the first week, 9% relapsed after one week, and 1% after two weeks.
My ability to do 98 days of NoFap (and without nocturnal emissions at all!) came from God. During this time, I humbled myself, tried living a pious life, and routinely went to church. When I became tempted, I said my prayers instead of indulging in it. During this time, even porn and pictures of beautiful women rarely tempted me. Even when taking eurycoma longifolia and tribulus terrestris, instead of becoming horny, I became stronger, had more stamina, and was more socially active. Energy transmutation was real at that time.
But on the 98th day, hubris came to me, and I thought that I was strong now. I began testing my boundaries by purposefully watching porn and images of beautiful women, and we all know the results.
Now the question is, why haven't I been able to replicate my past success? Why do I keep failing to last more than a week by becoming unbearably angry?
Over the last 2-3 months, I've been holding a grudge against our Lord Jesus Christ and hating Him. I disagreed with many of His teachings and thought they were making me weak. I believed I could become stronger by ignoring parts of the teachings that didn't make sense because I saw many unchristian and non-Christian people succeeding in life.
This Friday, on the day of St. Demetrius of Thessalonica, there was a divine liturgy at my church. So, I went there even though I had to go through traffic jams during working hours. In the church, I took the liturgy seriously since the church was empty, and I could concentrate fully. After the divine liturgy, I felt precisely zero anger, hate, and other bad emotions. Until this evening, I feel at peace with zero anger.
I do not think this is a coincidence.
Another thing I found out is that I can only be healed by going to an Orthodox church.
During these last few months, I went several times to a Catholic church for the weekly mass and first Friday mass. But it did nothing for me. I thought that by praying in more places, I could get closer to God. No offense to the Catholic members here, but Catholicism does nothing for me. From now on, I will not go to a Catholic church to pray out of my own free will, except when invited by others, such as for weddings.
If there is a liturgy outside of Sunday divine liturgy in my Orthodox parish, I will make the attempt to attend it. I wish to repent for holding a grudge against the Lord.