I worked with an older engineer (late 40s) when I was 21 (and with a bunch of young SDEs) and he was proficient, intelligent. His downfall was his ego and inabi

I worked with an older engineer (late 40s) when I was 21 (and with a bunch of young SDEs) and he was proficient, intelligent. His downfall was his ego and inability to make trade offs. He beat every decision, design, code review to death and couldn't see the forest for the trees. Writing in Java, he would use byte arrays or unfold loops for unnecessary performance gains. He sabotaged meetings because he would derail for such a long time on minor issues. He was only there for 6 months and jumped ship to Google.