I'm this kind in a sort of controlled way. I believe in true love and that has worked out pretty well for me so far.
It's the religious stuff that has really brought the bitterness/cynicism most for me. And it was many incidents, not just one. One could be an anomaly. What I've seen is no anomaly.
I still believe in the ideal and in the principles. Somehow I got through the crisis that was Bible college with my faith in God in tact. But it's a transformed kind of faith. Deeper and more resilient, is the best way I can describe it.
My faith in religious people and institutions is what is mostly shot. And people and institutions in general. Good people are the exception, not the rule, in church and outside church, with no discernible difference in concentration. The main difference is that church people like to hide their self-serving behavior behind a bunch of pretty lies a bit more than the others.
And yet, I'm still trying to find a church I don't hate.

Last Sunday we tried the Salvation Army church and I kinda liked it. Maybe they don't believe that Rush Limbaugh is God and Glen Beck is his prophet. I know. I'm just setting myself up. Again.
My NT husband has been on basically the same ride as I have and might have a slightly more indifferent cynicism, but it's fairly close.