When you offer advice/opinion, people say, "yea yea, now you're Christian, only you know what is best."
When you make a poor choice, people say, "so what if you're Christian? You're no better than any of us."
True, just as we are, no man is any better/worse than any other. Turning to Jesus allows a teacher into our lives to guide us, a father to lean on, a chance to be forgiven and make right. Turning to Jesus doesn't mean we'll never make mistakes again - human as we are, we don't always remember to surrender all decisions to Him. But we are given multiple chances to fight the same temptation if need be, drawing strength from our God, until through Him we are victorious over these challenges, again and again. Every "wrong decision" is a lesson in diminishing myself and leaning on Him, surrendering to His will, until hopefully one day it may become second nature to us. None of us are there yet, but our Father in heaven loves us anyway, and will always be encouraging us. He will not give up on us, neither should we give up on ourselves.
So when we make a mistake and men judge, it's ok to say, I was wrong. Men are poor representation of who Jesus is. Don't judge Jesus or God based on men, find out about Him by reading His word and talking to Him in prayer.
What we do matters
Faith that doesn't change the way we think, the way we do things, our attitudes really isn't faith at all. But acting like Jesus, doing the things He does, teaching the things He teaches without faith recognizing him as God's son, without experiencing His love for each of us will cause us to go wayward. What we do becomes a chore, and no longer out of the joy of His love. At it's root, Christianity isn't about changing the kind of person you are, or what you do, or what you say. It isn't about making life easier. It isn't about building a life that the whole world envies. It is primarily about building a relationship with Jesus. Everything else is an extension of how that relationship shapes our hearts.