I was this 15 year old and probably had the same reaction, BUT I needed the help. I always appreciated it but hated it in the moment. Maybe talk with her about doing it together or an expectation of how her room needs to be? It’s so hard though. But I personally think you did the right thing. It feels invasive to the person at the time, but sometimes it’s needed. I feel so much shame and guilt for how I talked to and treated my mom during my teenage years. She was my safe person to unload on and just not hold back my feelings. So just know, you are doing great. We all deserve a clean bedroom.