why does she favour him sm

idk whats been going on lately but everyone's so MAD at ME?? like I didnt do anything. I cleaned my room for an hour, saw that I lost one of my earbuds (wireless) and then my whole room went upside down after tryna search for it. Didn't find it, and then today my STUPID HOME ROT OLDER BROTHER decides to go into my room when I'm not there and throw my whole earbuds case around the room, (dented) and then hides it. This was literally in the morning too, and then my ma was taking his side, and if I even said ANYTHING she'd start full on screaming in my face. Like now yeah whatever I'm thankful I have ONE OF MY 2 EARBUDS and the case, but like ITS SO ANNOYING MAN. and now yk what I'm thinking, he's obviously the one who threw my singular earbud somewhere and I have no clue WHERE. its aggravating me so much I hate how my ma took his side and she didn't even tell him off like wtf is wrong with u? And then she's like "oh idk whats with u, ur attitude isn't it." LIKE I DIDNT EVEN DO ANYTHING WRONG. ITS A NORMAL FEELING TO GET ANGRY IF SOMEONE PURPOSELY THROWS AND HIDES UR STUFF?? not if this makes a difference but those earbuds were priceyyyy and I got them on my bday, so they're something to me. I showered and I felt so frustrated I literally cried throughout my whole shower cs like whys my older brother like this wtf is wrong w him?? he insults me all the time, I had such a bad day yesterday, came home, he insults me and its just my last straw so I obvs say smthing back, but then IM the one who gets told off? Then I just went up to my room crying and fell asleep. Screw everyone in my family tbf