Proving you wrong

This story started way before our little cinnamon bun Peter Parker became Spiderman, but don't worry, we will get in his 16's pretty fast.
What if May and Ben Parker happen to know The Avengers? What if suddenly Peter becomes their nephew and inseparable part of their big family?
But what if the The Avengers started thinking less and less about him? Started treating him like a kid they just met, or even worse-treating him like their punchbag for emotions. Every emotion, but with the time the happy emotion around him disappeared fully. What if he becomes 'that one thing' in the house that no one likes and doesn't miss a chance to comment on how much ugly or useless it is?
Will Peter show them how much they are wrong? How would they react after they realize what they have done? What would they do or say when they see him after years? Will Peter be able to forgive them?