A quick literary search suggests there is no evidence linking a vegan diet with a reduction in testosterone. In fact, most studies found an small but significant increase in testosterone with specifically vegan men.
A simple google search shows nothing that backs up your claim, odd that you would have made it.
Being a vegan, I like to stay abreast of the literature, and I'd never heard of a link between veganism and low T-levels. I quickly checked it, there's no link (in fact the opposite seems more likely), so it seemed like an unnecessary dig at veganism for no reason. I don't have a vested interest in any of the other claims OP made, so that's why I picked at that one. You don't have to fact check an entire comment to have an issue with one point.
I can think of a hundred bigger crimes ( sopuli.xyz )
Alt Text: post that says dripping testosterone levels in men since 1980s is the biggest crime of the century.