And there arose a sharp disagreement, so that they separated from each other. Barnabas took Mark with him and sailed away to Cyprus, but Paul chose Silas and departed,
2 Timothy 4:11
[Paul says] Luke alone is with me. Get Mark and bring him with you, for he is very useful to me for ministry.
We have all been misjudged at a point in time of our lives. Even Paul the Apostle made the mistake of judging Mark wrongly. Fortunately later he realized his mistake and owned up to it. Because we don’t see God but we see people, it is easy to take their words more seriously. Don’t let what someone says or does discourage you. And don’t prove naysayers right by giving up on yourself. It is GOD who is the author and finisher of your life, and nobody else.