I created a throwaway account, as is normal practice on Reddit when you want to ask something without it being tied to your main account, and it was quickly perma banned, and a 7 day ban applied to my main account.
I submitted a DSAR under GDPR rules, and like DF5JT I just got some truncated crap and none of the information I actually wanted.
Currently going through legal action with Reddit over this. In their initial defence they admitted that the ban was automated, and when I appealed a human looked at it and confirmed it. The ban was for being a bot, which obviously I'm not, so they admitted they made a mistake that really human review should have fixed. It appears that they also deleted the data that I asked for, which is a fairly severe GDPR violation. On top of that, they tried to gaslight me about it, for example by showing fake login errors and a fake password reset process, in order to supposedly access the DSAR data, when in fact they had already deleted both the account and data.
Currently waiting for mediation to be scheduled, basically a 1 hour phone session where an intermediary tries to see if there is a way we can settle without it getting to court. Given they have admitted they screwed up, and have deleted the data I asked for, and seem to have a policy of abusing users who submit a DSAR...