How to I deal with a hypocritical, neurotic aunt and selfish cousin?

My great aunt and grandma are the only ones in my family who love me and my parents. Ever since my pug dog got sick with cancer(she has died), my aunts, uncle, and cousin told us she looked ugly and to put her down. No comfort at all. They are all losers anyway and i hate them now because of it. My great aunt used to give me gifts to try to make me feel better about my dog. Although I was still sad, it did make me feel loved. Those I mentioned above have actually said they wish I was never there and I am selfish. Anyway, one of my aunts told my great aunt to stop it because it would put them in debt. I was wrong for asking that stuff which reached 1,000 but I made up for it by paying back. I felt sad and they just make me feel bad about it. My aunt lives with my great aunt and grandma and helps pay for house. But the whole reason they are in debt is because my aunt took herself and her bratty daughter (my cousin) to Mexico. And one trip cost around 4000 and they have gone on five trips! And my aunt recently redid my cousin's bedroom which cost 30000 I believe. And she continues to get my cousin expensive little trinkets. That is so hypocritical yet my parents I have asked for money only when we need dire help like for our mortgage and food and we are called the selfish ones. I seriously want to kill my self because of these selfish witches! I need some comfort

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