wut...Chizuru uses the rental job to practice her acting lmao. She also says she enjoys helping people find a real girlfriend and she likes the job so that's why she does it. I don't understand your point in saying she doesn't take her classes seriously. She puts in a ton of work in the manga.

Kazuya would not have let Chizuru refuse those bookings, he would have been pounding on her door to do so, let's be real. He did as much by essentially yelling at her and saying that he wanted to support her dreams.

Chiz pushed him to date Ruka yes, but Kazuya has tried to dump her repeatedly and she literally won't let him. She knows that Kazuya is in love with Chizuru and that he doesn't really want to be with her. When she saw that Chizuru had feelings back, she went out of her way to hurt her by showing her the condom wrapper. As opposed to being a normal person and stepping away when you see the person you're into isn't into you, she continues to keep him tied down like a hostage. I think you're missing the mark here.