I somehow watched Eromanga Sensei to completion, including the OVA. Here are my thoughts:
Basically, this anime has a ton of sexualization and not much else. If you want ecchi cumbrain garbage, here's your jerk material. There's no other major selling point here.
Most of the main characters in this are writers or content creators in some form – I thought this might be an interesting dimension to explore. Unfortunately, this show does not deliver any kind of interesting story whatsoever. The supporting cast, despite being composed of artists, are mostly treated as sex objects, and the scriptwriting reflects this accordingly. I was initially hopeful for the content-creator perspective of this story, but they never really provided anything substantial in this regard. The male MC is a writer, but otherwise he is a spineless idiot with zero personality, as usual. In fact the entire cast is unlikeable for various reasons, as well as lacking character development in general.
Eromanga Sensei has very little entertainment value besides arousing your poor abused weary foul fap-blistered septic basement-dweller chode. When people say they hate anime, this kind of show is what they are thinking of. Frankly, it's the textbook definition of garbage. It has plenty of lewd content though, so it may be able to assist in draining your sweaty hairy sensitive delicious lustful intoxicating voluminous nutritious testicles, which perhaps is an advantage depending on your perspective. There's not much else of value here. Of course, there's nothing intrinsically wrong with that; boys will be boys ;)
Seriously though, there are some funny moments, but I wouldn't recommend watching this unless your primary motivation is sexual in nature. This anime really is shameless cumbrain material. Some of the (usually sexual) comedy did get some laughs out of me. Also, if you're one of those people obsessed with shipping and who wins the MC's affections, or someone who sees love triangles as a glorified horse race to place bets, then you might personally find this show entertaining. There are multiple female candidates vying for the male MC's attention. The OVAs in particular focus on this aspect of the story.
I can see why this show spawned so many memes. Unlike the characters themselves, the meme material Post too long. Click here to view the full text.