Might be a good time to give a shout-out to teddit (https://teddit.net), which you can even self-host if that kind of thing floats your boat.
Available public instances: https://github.com/libreddit/libreddit-instances/blob/master...
Note that both teddit and libreddit are both read-only frontends to reddit.
A: The Reddit API being slow or rate limited.
B: The site being hosted on a cheap VPS.
If the second issue is at play you could speed things up by running it locally (the README file includes instructions to do so with either Docker Compose or directly via Node).