AIO for asking my sister to clean/unclog the shared shower?

For some context I live with just my mom and my sister, my sister and I both are 18 and share a shower(I wouldn't say bathroom because I would rather die than voluntary use that nasty bathroom lol sorry). We have shared this bathroom for a couple of years but it was really mentally exhausting asking her to maintain her mess so I used my mom's up until last year.

The problem is the drain, as there are many problems with the bathroom I have learned to ignore them and not ask because that turns into a 2v1 fight (Mom & sister v me) However the drain gets clogged VERY often, causing soap build up and pooling/ a literal tub full of water. Now the thing I must add is I always ball my hair up to throw out whereas my sister puts it on the walls or down the drain. So I didn't understand why it was continually getting clogged, I know now because every time I snake It out clumps of black hair and soap buildup come up. This is the funny part, despite my sister and I being twins I have blonde hair and her, black hair.

I suppose this brings me to tonight, I go to shower in the shared shower after 5 days of using my mom's shower. Ofc when I turn the water on it doesn't drain in the slightest. Mind you the last time I used that shower I unclogged it because ofc it was clogged. So...I simply ask my sister if she can unclog it because I HAVE NOT USED IT SINCE IT WAS UNCLOGGED, and my mom gets so mad at me saying " you need to learn how to unclog it yourself, you are always asking her to do it for you" mind you, I never even spoke to her. But for some reason she feels the need to be involved...

sorry if I am low-key not making sense, I feel like I'm literally going crazy and living in an echo-chamber telling me I am for wanting basic respect.