I cleaned a friends apt for him that looked about 10x worse than that. Took 4 competent adults 8 hours and I don't know how many bags of trash anymore. It was for renewal inspection and he was on cruise.
I did much screaming and I was the least squeamish person there. Grown men wouldn't touch things I removed. Yes, we used gloves. I was also unfortunately the only one who could get on their knees to scrub the bath. Took sos to get the oil film off.