given that the main character (an allegorical stand-in for Townshend himself) is sexually abused by just about everyone in his life
In the Broadway production, he was only sexually abused by his uncle. His father takes him to Gypsy, but ends up being horrified by her and removes Tommy before she can do anything to him. I don't recall anyone else sexually abusing Tommy at all. It's not that Tommy didn't hold grudges so much as he personally offers forgiveness to his family in the end.
I'm surprised to hear people confused by We're Not Gonna Take It from the Broadway production. While being interviewed with Sally, she asks how they can all be more like him. Tommy is taken aback and says that all he's ever wanted was to be like all of them...normal. This begins his epiphany of rejecting the role model and celebrity status placed upon him and his fans, feeling betrayed and scorned, reject him in return.
TOMMY:
Welcome to this house
I think I now know why you're here
You want to be like Tommy?
I'm glad you're not I hope that's clear
You shouldn't try to ape my show
It isn't just pinball
You don't need to claim
Your share of my pain
You're normal, after all
You might as well get drunk, so sorry
I've got you sussed
No instant high for free here
This is a bust
I didn't live out some fairy story
Some rags to riches crawl
I couldn't see, I couldn't hear
I couldn't talk at all
FANS:
We're not gonna take it
We're not gonna take it
We're not gonna take it
We're not gonna take it...etc.
Tommy reflects on the silent yearning of his childhood (See Me) and on the words "Heal me", Tommy embarks on his journey of healing and forgiveness, starting with his family, the only ones left by his side, and ultimately, all those who exercised influence on his life, directly or indirectly (Listening to You). They all join him and in solidarity, extend the anthem of inspiration to the audience.
One of my all-time favorite shows. My parents attended the tryout in La Jolla and called me that very night overjoyed with the experience, telling me that something truly special was going to hit Broadway. And they were right.
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian