Stoicism is one of the suggested areas to go for self-improvement on TRP, and it is how I came here from /r/TheRedPill (TRP).
The commonality I see between the two concepts, at least for me, is to focus on seeing the world as how it behind the facade.
Example:
When we have meat before us and such eatables, we receive the impression, that this is the dead body of a fish, and this is the dead body of a bird or of a pig; and again, that this Falernian is only a little grape juice, and this purple robe some sheep’s wool dyed with the blood of a shell-fish: such then are these impressions, and they reach the things themselves and penetrate them, and so we see what kind of things they are. Just in the same way ought we to act all through life, and where there are things which appear most worthy of our approbation, we ought to lay them bare and look at their worthlessness, and strip them of all the words by which they are exalted.
This in itself should warrant looking at TRP for yourself, to see what it really is, instead of taking the words of other about it. I've learned a lot from TRP. I moved on as it all became a repetition of itself in the end. But the idea that all of it is terrible is ridiculous. In TRP alone there are close to 100k subscribers. If it was all bad stuff it wouldn't make sense that it was still around, and growing.
So what is TRP about? At the sidebar it says it is a place to discuss sexual strategy among men. To be able to do so means you will have to remove a lot of the mystical parts of our mating rituals. It is not a romantic place to put it like that.
It blames feminism for making it more difficult for our society to find love, and I do believe this is the part where you'll see some disturbing internet hate speeches being written. What you will learn there at the end of the day is that too be able to get anywhere you need to improve yourself.
TRP is about self-improvement. What you decide to improve upon, and for what, is not something TRP stresses too much. It tries to me amoral, meaning if you want to get really really good at having sex with different women every night, then it will help you with that. If you want to have a well functioning marriage again after spending too much time at /r/deadbedrooms/ it will also help you with that. It won't focus on which one is the best one.
But to learn about western civilisations mating rituals you will have to analyse what we want, how people act, and why they act like this. These three areas, what, how and why, are crucial for understanding the framework of anything. And to me it was incredibly fascinating to see a much clearer picture forming. Most people are wrong about TRP in my opinion.
As for Dark Enlightenment? I looked at it, but it is too fragmented, too racist and too unfocused for my taste. The way the sub is run is also not to my liking. Mainly it acts as a news aggregator, where mostly people just post links without any analysis. Something might grow from it, like TRP came from /r/seduction in many ways, DE cam from TRP, but I am not convinced of the direction at this point in time.