I felt your pain. Somehow I ended up with only FRO shifts for somewhere around two years, maybe every three months I'd get a non-FRO shift. And it was a constant dumping ground for everything. I'd get talked to about the state of the fitting room, I'd do my best to try and keep up, but there's only so much you can do when you work 25-30 hours and the store is open over 100 hours each week, I'd bitch to leadership and nothing would change. I'd get all the tagging done, a Herculean task, get a single day off and the next day I came in there'd be hanging clothes taking up 18-24 inches of bar space needing tags on top of over a dozen torn underwear and socks packages.
I was given opportunity one day to spend an entire shift cleaning out the closet. I was promised that no more fixtures would be allowed in it. It was beautiful when I finished, nearly the end of my shift, and less than five minutes to go to the end a softlines TM pushed an entire cart of fixtures (we were allowed to use them at that point) to the closet. I said nope not the closet and she said "Fine! You put them in the fixture room!" Had she been five minutes later she would have sabotaged my entire day's work.
The only thing that made it change was a new ETL coming in, all of a sudden it was rare that I got an FRO shift because he wanted everyone everywhere. I'd go to the fitting room and gleefully do to them what they had been doing do me, I'd go to the fitting room and the desk would be completely covered with what other people (not me) dumped and the FRO freaking out about people just leaving their shit there and I'd laugh on the inside. Things got really bad there for a couple of months but it wasn't my problem anymore; even when I was FRO leadership wasn't looking at me as responsible for the fitting room because it was equal responsibility with the rest of softlines. And then things got a lot better, as people realized that they couldn't just dump stuff there because they'd have to clean up too. By the time I was getting regular fitting room shifts again the other TMs were a lot cleaner.
I'm glad I jumped ship though before the final modernization mandate kicked in. I had a couple days of the final standard and I freaked out when I saw all the clothes at the fitting room even though I knew it was no longer my problem.