Congratulations on waking up from your coma or escaping from underneath the rock or whatever other circumstance lead to you missing large events from the past few years.
There's a few tools for this purpose out there, such as Power Delete Suite for Reddit [1] and Redact [2]. Maybe some people can share some others. I'd like to find something I could use to backup old reddit posts then delete them or my comments.
https://github.com/j0be/PowerDeleteSuite https://redact.dev/
Reddit mods can also give comments hundreds of upvotes with a button. So they lock threads and make it look justified by giving the top comments disagreeing with the thread hundreds of upvotes.