Watch the video. Unless you think he actually squeezed a fake blood bag or ketchup pack against his ear for some unfathomably bad reason, it's very real. You're sort of beating a dead horse here. Multiple reports, photos, video etc have confirmed that he did indeed get shot and that the injury to his ear was the result of that incredibly (for him) lucky near miss grazing his ear.

Either all the visual evidence (including live video and photos by seasoned, respected third party photojournalists) was somehow amazingly falsified, or Trump literally used fake blood to make it seem like he got injured by the bullet (an incredible assertion even by Trump standards) or he really was shot just as has now been widely reported.

Also, that he would grab that specific ear just as the shot went by, and moments later suffer an injury completely unrelated to a bullet in that exact ear, would be an extraordinary coincidence. Caused by what else?