A lot of what you describe, like constant anxiety, stress, and taking everything too seriously (as if the consequences of mistakes are too grave) may come from

A lot of what you describe, like constant anxiety, stress, and taking everything too seriously (as if the consequences of mistakes are too grave) may come from childhood trauma, CPTSD or emotional neglect. There are many communities online that discuss these specific things in that context. You seem to touch on similar themes with your point 7 about societal programming and later with the point about cheating yourself. Acceptance is key in healing from emotional neglect and so is developing self-worth, stopping self-abuse, or "cheating yourself". Specifically through suppressing your interests, self expression, hiding your flaws, and how that both comes out of low self-esteem and reinforces it. So you are spot on. But this seems tailored to a person who has suffered through this kind of abuse. I am saying this as both someone who has experience with emotional neglect and a video game designer. I think the article applies more closely to the former experience than the latter.