I (15ftm) have an on and off relationship with my sister (13f), sometimes I love her to bits and sometimes I wish I was an only child.

So what happens with us is that I'll "complain" about something and she'll just act like I told her to khs. She'll shout at me or she just throws a tantrum (worse when my parents are around), she doesn't have any disabilities like autism which would give her a reason for her behaviour. It's even worse when her friends come over, she just acts like she hates me, I don't know if she thinks she's being cool in front of her friends? (some of the "friends" she always complains about after they leave) but it really bugs me.

I'm trans and she had this friend who used to call me slurs and she would SHOW THE MESSAGES TO ME laughing about it and then not confront her friend at all or not tell me their username so I could message them privately. (luckily they're not friends anymore, the friend blocked her)

I don't know how to tell my parents and I can't tell her to do anything because she could easily physically overpower me and she lowkey scares me when she's angry because she just acts hysterical

Are these valid reasons to "hate" her or am I just overthinking things?? I don't know what to do