Avira- respect to you for your honesty. It makes sense you would feel that on Yom Kippur which also reveals the yechida for those who tap into it (itzumo shel yom)
To feel it on a more regular basis- Chabad Chassidus is open to you.
Am I allowed to say I’ve moved past where I was in high school?
Emunah- he would be midas habeinoni- ie acting like a beinoni, but he wouldn’t be at madreigas habeinoni-have the emotional strength to treat every aveira (including in thought) like turning on the air conditioner on a very hot sweaty shabbos. At least that’s what I gathered from Rabbi Paltiels explanation in sem.
It’s not all or nothing. Tzadik would be like finding out you ate pig