Victoria (I think)!

Yeah, AMAs lost their charm for me after she got the can.

I think the various reddit dramas over the years have taken their toll on the site even if they didn't completely kill it. You can see it in moderation these days, individual sub mods have called out the fact that no one pays them and they don't have the motivation to spend all day enforcing quality for free. No one has stepped up to replace them so most moderation on Reddit is site wide LLM powered moderation.