Is this anger right for inlaws....?

Thanks Redvelvet, these comments and advices are so true from heart... you know what... I try to let it go and something like this happens again and that just brings me back old memories as well.....
I just came back from Pakistan and got all the dresses i wanted, but the thing that they just send me a cheap dress just makes me feel mad....
My sister in law has a very decent sense of fashion but only for herself.... she get most of her dresses designer made, and then when it comes to buying something for me, its the cheapest lowest quality...
I once sent pictures of the dresses i liked and i told her to get them made on raw silk... but when I got them, it was totally different design then what i originally had sent and a very cheap silk, wasnt even close to raw silk.....and she told me that she liked that material better, and the pics i sent her, she couldnt find the designs and no one was willing to make those so she just picked some other.... all this after i got the dresses, she didnt mention anything before when she bought....
and the thing is they ask me what i want and when i tell them i never get the same thing.... i even once told them to stop buying fabric and just get me few dresses from Miss Soni in lahore, i liked their dresses had few of them... she goes there and buys the ugliest dress..... so i never asked to her to buy readymade for me again....
and now i keep telling them not to send me anything and she sends me this and then keeps asking her brother if i liked it and of course he sayss yeah its very nice and she loves it....
i feel insulted when they do this, that they think i wear these things....
I have told them that i dont wear these dresses on daily basis so i dont really need the home wear, only something to wear when i go somewhere etc, but my MIL came and most of dresses she brought was marina and cotton, simply sticthed.... i am always in trousers and t shirts at home....so they are useless to me and they know it....
Anyways, you are right I should be thankful for so many things in my life and not worry about these things but it gets hard sometimes....
I should be better in mangaing my emotions.....

Thanks!