RSRH Zatzal explains that Moshe said: “I did not hurt a single person consciously of my own free will.” But what if Moshe offended someone unintentionally? Maybe he was the cause for somebody to get hurt, and he is totally unaware!?
אֵין הַקָבָ"ה בָא בִּטְרוּנְיָא עִּם בְִּריוֹתָיו — Hashem does not demand from us more than we are capable of doing. An old Novardoker once repeated this hundreds of times for Mussar Seder. Hashem doesn’t want people to be stressed out over every move they make. Even if they sin, there is a healthy way to deal with our sins and shortcomings. All we can do is try; we will always be making mistakes and doing sins. The main thing is to keep moving without being Nis'pael, and without being dragged down by all the negativism going on in our lives.
A couple came to me. They were going through tremendous Tzaros, and they made a comment: “Maybe we are being punished for some sin that they aren’t aware of?”. I replied to them by mentioning the words of RSRH Zatzal, and this calmed them down.