Hello Eirc,
Yes. Your chart makes sense based on your accounts.
You are making an intense effort. While one really needs to make an effort, too much of it can be a burden to the mind. Let me give an example from the Tipitaka.
One time a musician by the name of Sona became a bhikkhu. He was trying very hard to get to magga phala, but could not make much progress. Eventually, he became discouraged and came to the Buddha to say that he was giving up and going to disrobe. He said, that he thought he just did not have enough wisdom to make it.
But the Buddha could see that Sona was capable of becoming an Arahant. He also knew that Sona played the violin in his lay life. He asked Sona: “What would happen if you have the strings too right when you were playing the violin?’. Sona said that it would not yield the right sound. Then the Buddha asked: “What would happen if you have the strings too loose when you were playing the violin?’. Sona said that it would sound dull if the strings were too loose, and that he had to get them tightened “just right” to get proper sound.
So the Buddha told Sona that he was trying too hard. That Sona should not totally give up, but must find a balance. Sona understood and went on to attain the Arahanthood.
So, there is a danger of “burning out” if one tries too hard and become disappointed. Furthermore, some people say, “I will give 100% for such and such a time period and if that will not work I will give up”. Both those are wrong approaches.
– One should find “the middle way”.
When you can feel the mind “heating up”, take a break and may be listen to soothing music, read a novel, or listen to sutta chanting; whatever that makes you relax. Take a walk, or do some exercise. Mind can take in only so much at a time. In fact, it is a great idea to exercise whenever possible. This could be just me, but if I don’t exercise for a few days, I run out of energy and don’t feel good.
– Whatever you do, don’t turn to loud music or video games. That will make it worse.