The things I wear look so bad on me ı dont know how to a wear nice?

I am 68 kg and I am currently in the process of losing weight. I went to the mall today. I had a coat that I really wanted but it looked so bad on me that I took it off and wore some things like this and it really didn't suit me. And it's not just because of my weight because when I was 58 kg a girl told me that clothes are nice but when you wear them they turn into pajamas and look so slutty. I especially hate my hip area. Im soo hate myself.

The things I wear look so bad on me ı dont know how to a wear nice?
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