the better way to express it would be to spell ‘were’ instead of ‘where’

“Be the adult you needed when you were younger” is my version.

be the elephant you want to see in the room

Yes, but "people" must include oneself as well. Else it just becomes another people-pleaser mantra.

I feel this is bigger than most people realize.

How many times has an improvement to society been suggested and "Well, I never had that, so why should others?" pops up, and something that could help a lot of people just gets tossed aside because somebody wants everyone to suffer as they have.

"Treat people how you wish to be treated " is mine

The old "do unto others' maxim. I agree.

I think apart from the spelling mistake there is one logical error in it for maximum kindness. It excludes all of those people who were fortunate enough to be surrounded by kindness. If they weren't denied any kindness they're allowed to be assholes.

It's a variation on the theme of "do unto others as you would have others do unto you." "Meet all people with kindness who mean you no harm." could be a rephrasing that balances maximizing outward kindness with a necessary amount of self defense.

Okay however many people where you denied about?

I made a vow in my twenties: Think about how my sperm donor would handle a situation/person and do the exact opposite...