A documented story is of Custer just before Appomattox C.H. negotiations. He rode up (btw Custer had blue....velvet... custom made uniforms with real gold thread epaulets— quite a dandy so to speak) to General Longstreet and demanded the surrender of the Army of N. Virginia. Longstreet told him to get lost or else be cut down where he stood.
Custer had it coming, really. Just another mis-appointed brat with a big mouth and arrogance that got him, and most of his men killed.
Sorry, no. Custer was an intrepid fighter - you don’t get all his promotions without doing something right. And he took some of the best photos of the war and the Indian wars that followed - to see the giant photos of him at the LBH is to be in the presence of SOMEBODY.
BTW, I love both sides of the war. Fine Americans, all.