Reddit is lightning fast, and is very stable...
...oh. I got it! You might be trying to use the dumpster fire that's https://reddit.com
Ignore that, and head over to the actually functional Reddit at https://old.reddit.com
It's like HackerNews in terms of performance. You can still set it as default.
The "new" UI they have is unusable, and may God have mercy for the poor souls that walk into it.