Biff about Willy and reason for his failure,something that I think is important to understand Biff and his despair

Biff to Willy
"And I never got anywhere because you blew me so full of hot air I could never stand orders from anybody"
Those are pretty harsh words to tell to your father,but they explain the best relation between the father and the son, and reason for antagonism troughout the play.For Willy, the most important thing was that his sons were admired and likeable.He didn't care much about their grades,he never paid much attention to their success in school and that fires back.
He gave Biff false sense of importance and pride,but in reality he couldn't accept the fact that he is troubled man, and in his thirties, he is lost and confused.Willy badly wanted his dream about famous Lomans to become reality,he ignores all facts about Biff.Even after Biff's emotional breakdown and confession that he is nobody,that he didn't do anything successful in his life,Willy doesn't accept the truth.He goes on with the idea that Biff loves him and that Biff will continue what he didn't finish.Willy never changes in the play.Even his suit is the same and that is message that Willy lives in his imaginery world and one day he will wake up from his dream and will be too late to change his faith.