You'll really need to focus on self. How does going through this make you a better person? More resilient? More skilled at spotting the untrustworthy? All of the skills you'll learn from this thread and other places?

If you truly love yourself you realize that even your mistakes were part of building that self. I'm not being a dirty self esteem hippy here. You will need to grow from this in order to be a self you can truly love. All of that hard work is on you. You cannot just sit back and simply declare yourself deserving of love that you didn't earn through hard work.

Treat others like the weather. You can't control them but you can prepare for their expected behavior. It isn't the snows fault you are stuck in a ditch in sandals. You chose to drive around on cheap bald tires in winter without boots available. Every mistake is a chance to refine your weather checking habits and reflect on your preparation. Bringing emotion into that process is only a distraction.

Also keep in mind that emotionless allegation against stoics is false. The OG stoics felt free to let their emotions fly. They were only deliberate to express them in non self harming ways and to let them go once they were no longer helpful. Scream, wail, cry whatever it takes. If you need to hit something find a punching bag not your wife, kids, or wall.

Do all of that and in time you will let go of the frustration with them and with yourself for trusting them naturally. All that remains is the patience to know it won't be tomorrow and there will be ups and downs along the path.