Thinking of running away I have reached my breaking point...

So I 15M (from India urning 16 in July) and I am planning go runaway. I have ran away twice and attempted once.

Attempt 1 2021 June :- I tried to run away because I was treated like a second class citizen by my own father in his own house where he neglected me for his 3rd wife and her son. I was caught by the security of the society/apartment complex where I lived and they returned me back to my house. It was 5am and I had a bag full of clothes and other things.

Runaway 1st time 2022 June :- I had an argument with my father and simply left my house after which I took a bike (bicycle) and went to a relatives house, stayed for 2 days and went to my grandmothers house.

Runaway 2nd time 2022 August :- I felt like I was a financial burden on my grandmother and I couldn't handle her constant bickering and yelling (which at time went on for hours). I was going to school but instead of going inside the school building after reaching I turned away and was free for the next 15 hours. During this time I stole 2 bikes and sold them for $20 (1500rs) total. Those 15 hours were the most beautiful moments of my life. I was free, I was on my own and most importantly I was happy. But then at night 11pm I got caught because apparently my relatives were patrolling the streets.

Current situation :- My grandmothers bickering and yelling has only increased. I had to take a year gap from school because my relatives concluded that I'm mentally unstable when it's my grandmother who's mentally unstable. Her anger is uncontrollable and she has to take it out on someone and most of the time it's me and her anger isn't even for a good reason. I remember one time I had fever and I was trying to sleep while my head was hurting and she called me a failure and said personal insults and made me cry for being introverted and not talking with anyone in a recent function we went. Just a few days ago I seriously considering running away when she yelled at me for 2 hours straight because of my "bad handwriting" and conversation very quickly changed to her throwing personal insults towards me. I feel like I am cornered and I don't have anyone to talk to. Please give me some advice and help me because her yelling is getting more intolerable for me day by day. I wish people treated me like they treat others...