Did you try loosening it with a vice gr
I know this may sound silly, but have you tried loosening it with a vice grip? The only other thing I could think of is maybe a higher quality TORX socket. Once you are able to get the bolt out, you will have to replace the "striker bushing", which is the little plastic piece that goes around the metal door latch. In my photos I have attached, mine are cracked, which is why my door was rattling so much. Replacing them fixed the problem immediately. Make sure when you take the metal latch off, that you properly align it when you put it back, typically there will be a ring from the dust that has accumulated underneath. I hope this helps.