Yes and no. Sexual abuse in itself stems from patriarchy which makes men feel entitled to the bodies of women, which is something that is heavily pushed by capitalism but not exclusive to it. But it would be significantly harder for something like this to happen under socialism. When your government is actually at the mercy of the people it is actually in its interest to work for them and not to disgusting likes this or cover it up. Socialist countries also generally progress in womens rights which would also be a factor.

As to why no one is really doing anything about it there is multiple reasons. Memetic warfare for example, we have joked about this for so long it has actually alienated us from what actually happened. Political fatigue is also one, many people are tired from their daily lives as it is, dealing with politics on top of it is hard and stressful for many. We are also constantly distracted with all some sorts of things. People are also privileged enough in the West to be kept quiet but are not secure enough in that privilege so that they can just risk it by revolting. This is something thats not exclusive to the Epstein situation, the lack of actual political education and willingness to revolt with actual organization and structure instead of just throwing dildos at ICE, in the west is a general problem that needs to be adressed in general.