Did you ever change from being trusting and filled with love, to being disillusioned and not trusting of people?

I’ve been told I am too trusting; I also have a genuine love for people and share kindness where I can. Lately over a period of time due to different circumstances and events I have become appalled at a lot of people. In terms of their self driven desire to suite themselves at the expense of other people. At the end of each day I consider if I have harmed another person in some way and it plays on my mind until I sort it out. It seems though that most people these days don’t bother and carry on as normal. I guess my trust has been blown too many times and I have been hurt over and over. I now have reached a state of complete inertia
Where I do not believe any goodness exists. It terrifies me. What has happened to people? What happened to kindness, values, honesty and integrity? Are they outdated in today’s society? But most of all, how do I overcome this deep sorrow for the loss of what I feel is basic humanity. How do I overcome how lost I feel in terms of ever believing there are humans out there that are not agenda driven? Now I think I will never trust again, and this basic love I have for people has gone. I feel like an empty shell. I really need to sort this out and would appreciate your insights.