I feel mad a my little brother and I am ashamed for it

(sorry if my grammar is bad, not a navite)

I am 23, fucking 23, and so mad at my little brother (16). For the past year, my mom has been working outside the city during the week, so it's just my brother and I. I work from home so I am mostly in my room.

I do contribute to home expenses, I bought daily life supplies, foods, the cats food and vet visits. I pay the internet and water bill, and probably will be paying the gas o electric bill as well. I also send money to my grandma every month. I make good money (4 to 5 the minimum wage of my country) and probably got enough to leave and live comfortably. But living with my mom give me the chance to save for a house. It's no unusual to still living with your parents at this age, all my friends - 1 live with their parents as well.

The problem: I hate disorder and my brother has ADHD. That have cause us issues from time to time. We had a big and ugly discussion this year because of it. Looking back, I feel so ashamed. I treated everyone poorly just because I was angry. I feel like I am the crazy one but at the same time I feel have all the right to be mad. Am I so unreasonable? So sensitive?

This morning I woke up, my brother cooked (weird) and left the eggs shells in the kitchen table (not weird at all, leaving cooking trash is an ongoing problem, he seems to be allergic to using a bag). I picked up that and clean the dishes (cause he will do it next week If I don't).

Then, I pickup his shoes, his bag, his shirt, his disgusting socks and put them in the door of his room. Why? Cause if I ask him to do anything, he won't or do it when he wants and I wanted to pass a broom before work (where all the dust come from?).

Each time he goes to the bathroom, I have to listen if he flushed and ask him to do it if he didn't (at least he learned to flush when he shit, that was a problem at the first half of the year). I stopped asking to wash his hands because he won't (the only thing I can't do for him) "I didn't use them", he say, maybe that's why I often find the toilet seat full of piss.

I bought lunch for both of us (I tried cooking in my lunch break, but didn't worked out). He eats and then leaves the trash in the table. I pickup that because he won't. I wash his breakfast dishes cause we won't.

Now he arrived home (early, that's weird). I am in my room and know that if I go to the living room there will be the shoes, the shirt, the bag.

And the worst part? The fucking TikTok sounds, so loud, so annoying, the loop videos made me crazy and I have to ask them stop them (my mom do the same) , to lower the volume. I can't be in the living room, I ask him to lower the volume "go to your room" he says.

I feel so mad but also like a spoiled brat. I am supposed to be the bigger person, is my biggest tradegy having to pickup my brother's dirty shoes?