I'm not saying it's bad, there are multiple 4.5+ games that stumble from scene to scene instead of having a plot, and Eternum is head and shoulders above them even in episode 1, which ends on a cliffhanger that sets the main story rolling, but compared to subsequent episodes the first one is a bit rambling.
It's not surpising, since it had to do a lot of things: showcase Orion's life before Eternum, introduce the cast, do an exposition on Eternum, show how Orion obtained the implant, showcase his first experience in Eternum, get the main plot going and finally sneak in a sex scene because it's an AVN.
That's a lot, so it's understandable that some people get tired of listening to people talk about Eternum at school, then listening to Idriel talk about the gems and the weapons, then listening to Annie talk about Eternum some more, then listening to Chop-Chop, then listening to Eva, then there's a cliffhanger. They see all these hot ladies and are itching to get to know them better instead of learning about a game inside a game.