That document is extremely full of bad, misleading, and outright false information. I shouldn't be surprised for a self described "anti-vegan copypasta"

The comments about soybean oil being the only main driver of the industry are just false. When we look at the most common extraction method for soybean oil (using hexane solvents), soybean meal (used for animal feed) is still the driver of demand

However, soybean meal is the main driving force for soybean oil production due to its significant amount of productivity and revenues

[...]

soybean meal and hulls contribute to over 60% of total revenues, with meal taking the largest portion of over 59% of total revenue

https://www.sciencedirect.com/science/article/abs/pii/S0926669017305010

The comments about the mental health show the cherrypicked natures of sources here. Earlier in the document it bashes correlational studies and those that have even so much as a weak potential to be funded by any one related. But now that it's convenient, it then relies on a beef industry funded study (listed that way right in the paper) that looks at only correlational studies. It also fails to consider the cause being the other way around. That some may be depressed because they see a world of cruelty that they oppose

The comment about slave labor ignores heavy amounts of slave labor used in the fishing industry, nor the prison slave labor in the meat industry. Nor the meatpacking industries unusually high injury rate and multiple human rights watch reports

Together, poultry slaughtering and processing companies reported more severe injuries to the US Occupational Safety and Health Administration (OSHA) than many industries that are popularly recognized as hazardous, such as sawmills, industrial building construction, and oil and gas well drilling

https://www.hrw.org/report/2019/09/04/when-were-dead-and-buried-our-bones-will-keep-hurting/workers-rights-under-threat

The claim that all vegans argue for it from negative utilitarianism is just very, very untrue. Many many vegans are not even utilitarian at all, some very strongly against utilitarianism

And looking at the overall sources in that document:

• 22 random imgur links
• 17 random youtube videos
• 14 random pastebins
• 3 random reddit posts/comments
• many many many random blogs

I can keep going for a while