I like your premise that we have been trained to hate ourselves by comparing ourselves to others. I think you are correct that this has caused untold suffering, especially now that we can compare ourselves to people’s curated lives on social media.
One thing I find hard to relate to is that free will is the answer to changing our perspectives. First, I don’t know what I don’t know, and I don’t know a lot, so my decisions can’t always be the “best” option for me. And second, I don’t think we can change our lives simply by deciding to. This may be a step in the process, but there are definitely others. Our behaviours are habituated, and so I think the only way we have to create sustainable and lasting change is to make small, incremental changes in the direction we want to move in.
Anyway, just my two cents. Very enjoyable read! Keep it up :)