If you want to search libgen, you can just... go to libgen
https://libgen.is/
In case it is unclear: libgen is good. Subverting copyright cartels is good. Authors getting paid for their work is also good, but copyright does not serve that role and is instead a weapon publishers use to retain control as obligate distribution passages and thus control over payment. Meta being able to vacuum up the commons (without even seeding) and launder it into a tool of mass informational disempowerment and control is bad. Meta being able to torrent while the rest of us can't is bad.
If you have a fediverse account, you can quote this note from your own instance. Search https://neuromatch.social/users/jonny/statuses/114202229470979951 on your instance and quote it. (Note that quoting is not supported in Mastodon.)