Investing is and will always be antithetical to the immortal science, the goal is to make gains from other people's work

Yes, in principle, however in the context of the western proletariat who must engage with the market to ensure their own existence, I do not consider it anti-leftist to give investment advice. Only if it supports landlordism or business ownership outright.

I have money on pension and insurance funds that use all available investment vehicles to maximize their profits, I have to compromise my values to get a (significant) portion of my produced value back because some libs thought that everyone should be an investor instead of feeding and housing old people as a right

I don't believe this structure is because of Liberal ideas, but an attempt by Capitalists to tie Workers' futures to the same mechanism that enriches Capitalists, therefore reducing revolutionary pressure. This is a consequence of Imperialism, it's an effort to turn the Proletariat into complicit Labor Aristocracy.