Is my sister toxic?

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I am 17f my elder sister is 23F

We ar four siblings and i am the second one basically the middle child who grew up knowing she isn't fav of anyone

My sister had our grandparents and my mother my younger sister had my father and my brother who is the youngest is ofcourse everyone's fav and I only got the scrapes

I look younger for my age but my sister looks her age yet she randomly points at me and is like you will look older than me in sometime or that your skin tone is dark

Comments like these used to hurt alot now they don't really

Another problem is that she compares herself to me alot

Now I study in night so I sleep in morning everyone knows this but my sister refuses to get out of the bed because I am still sleeping so why should she wake up

If my mother gives her some chores she immediately takes my name and says why no one is giving work but whenever I am the one doing work it's completely fine for her

She literally makes our parents turn against me

She never keeps any secrets and I kinda have started hating her

Am i wrong for feeling this way?

Idk why she's like this with and i want to make sense of it as to why that's why I need your advice help me out