Why am i the bead guy for telling someone the gift they got me was bad ?

My birthday was a few weeks ago and my sister said she was getting me some T-shirts. She asked what size i was i told her XL.

Fast forward to today and i have them. They are XXL and are to big. Their baggy and im just not comfortable in them. I told her this and her and out mum’s response was. No they fit fine and read the room.

No i said their to big, just because their a gift does not mean i have to automatically have to like them. I know what size shirt i am cause ive been buying my own for a fucking long time.