I don't think the quality of the front page changed all that much in the last month.
It has long been screenshots of twitter (primarily WhitePeopleTwitter, BlackPeopleTwitter) for years, at least since 2016.
Also short form video is all the rage and Reddit is really pushing it, but that basically means it's just all TikTok re-uploads (or crops of TikTok, or crops of TikTok of crops of Youtube). The new Reddit video player is really mostly screen recordings of things.
The last year or two once Reddit became really really mainstream has had a lot more repost bots though. They basically do two things: farm small subs and repost their content into larger ones, or pull content from the front page from 6+ months ago and repost it (even the top comments are often blatantly reposted). The bots coincide with reddit getting more into ads and mainstream advertisers.
But, there have been prolific reposters like Gallowboob for many many years.
Gonzozilla