I've tried to use Reddit for walkthroughs and to get good at video games, but frankly, twitch VODs tend to objectively be better.
What's become intolerable to me about Reddit is even if you use old.reddit, the entire site is last I checked in the moderation stats of one top 1000 sub I still have mod access to, is about 99% people on new reddit and it shows. People are linked to ragebait on the regular and you see chronically online but consistently misanthropic takes from people of all political afflictions on the regular. This is especially on the city subs but it's diffused to the entire website.
The moderation got worse because in Reddit's latest move to kill 3rd party apps they alienated many users who had been there for more than a decade and I still think people underestimate how much those people served as glue and unpaid labour, who just got alienated by contributing to a website for free and for no real reward other than being able to power trip that fundamentally abuses its user base. So as bad as the moderation has always been it has gotten even worse.
It's also clear that people have been brainwashed by one of the original sins of Reddit, the Karma system, where being fast and popular counts for more than being deliberate and correct. I know that I'm on a site that uses the same system but there is still a sense of what used to be called "reddiquette" and social stigma against abusing the system. It's not just that the worst posts are promoted, and they are, it's that people are so interested in playing the game just so their posts get seen that the average post quality is in the toilet.