what was Willy's tragic flaw?

[marisa]

i believe that willy's most tragic flaw would have to be that he keeps
living in the past and not facing reality. There are numerouse
ocassions when willy flashes back to the past and talks about how
happy he was. He can not accept the fact that everyone has changed.
He had many problems in his life including his affair, his argument
with his sons and even his difficulty with money. willy was so tied up
in his problems that he wasnt able to realize the reasoning behind his
problems.