...Plus, why is God mad at everybody because of 2 people...would he be angry with us if we had a beef with an neighbor but also beefed with the entire family...
legacy ,
your very logical question has a very logical answer as well. the entire 'Garden of Eden' account is symbolic, it didnt actually happen (there is no proof it did.)
the entire account is like a picture that is designed to help you comprehend a very profound 'truth', or fact. (hence the image heavy description of what 'happened' in that 'garden').
what does it symbolize? a very simple fact. man (collectively) is very lost. There is too much hatred and indifference toward one another. There is a 'fiery sword', an obstacle, between man and 'God' (Perfection and Good).
If you take the garden of eden account as literal, you can blame God, the Devil, Adam or Eve, none of which makes sense as doing this brings up an interminable list of why's.
But taken as a symbol, we quickly understand that man collectively is at fault, and thus man alone can rectify this 'evil'.