It doesn't matter what you say but how you say it. You may think you said the wrong thing but usually you just said it the wrong way. You can say the same thing but the impact will be entirely different based off your tonality, pitch, and volume. What you think may be a bad thing to say could actually be a good thing to say when you say it correctly.
I put my heart and soul into everything I do, and I still fail. Every single time. I spent my life thinking that if I fool myself to believe I have worth then maybe I'll actually achieve something. But even that, resulted in failure. Is there even any purpose trying anymore? I question my very existence every day in the mirror and find no reason