Custer was a fine General and a hell of a leader despite the Hollywood fantasies.
Men who called him reckless when they met him usually retreated on their first impression and called him a fearless front line leader who inspired me to follow him. The commonly accepted Little Bighorn story is mostly BS.
He was a war fighter and didn’t do well during periods of calm.
Yes, he was a warrior by nature. He also was saddled with a lot of ill-behaved immigrant troopers during the Indian wars which, I think, drove him bonkers. He was used to the strict discipline of the Union Army.