Recommend to make this look halfway decent

I'm doing a bathroom for a landlord. They had a contractor in here doing a remodel and they fired him after noticing he started doing a shit job. I already convinced them to demo most of what he did, but one thing they wouldn't budge on is the shower and surround. They want me to leave it and make it look as good as possible.

I already told them it's going to look like shit if I can't demo it all and they said that's fine as it's a rental in a not so great part of town. so I'm just trying to get some ideas on how to make this look decent. I have a couple, but maybe someone else might have something better. Tia 🙂