I also feel like all social media the there are very toxic aspects to Reddit. I used to be very active on there, but after receiving constant abuse and very few constructive replies I now rarely participate in discussions there. Again with the company going public like Facebook and Twitter, Reddit could come under more scrutiny for this.
Assuming you buy for a fair valuation I don't think it's a bad investment per say, but I think there are a lot of risks there. I find myself wishing for an alternative to Reddit a lot these days because I really miss the high quality discussions I used to have there 10 or so years ago.