Nah they made it pretty clear that although Fredo was dumb and a womanizer he wasn’t ruthless enough to hurt a family member. Like his wife said “you couldn’t belt your momma”. I think people misinterpreted “something in it for me”. He simply wanted to have some respect I don’t think he wanted or cared about being the Don really. I know some will bring up him saying “I was passed over” but I think at the end of the day he just wanted some respect in the family but obviously was stupid snd not cut out for that life. There still is zero justification for Mike murdering his brother