Although the sincere conversation would be probably the best option, I realize that it might be rather difficult in your case. You should find out what's the reason and then try to talk to him. Tell him how you feel and don't be afraid to do it. Good luck.
First of all, I have the same problems. But I found out the reason why he makes me feel that way. He wants you to try your best at everything. That is what dads do. They make their children feel like crap, but trust me later in life you'll know why he is doing it. Just respect him.
It all depends on the situation. He is your dad, but he shouldn't make you feel worthless. A polite way to address it is by saying, "I appreciate you trying to help, by all true means, but some words are just not needed. I end up really feeling bad about myself." And be sure to say it with sympathy and show that you do love him. It might help him to see that he says too much.
Communication is the key!! Talk to your dad and tell him how he makes you feel. Tell him you love him and would like to understand why he does this. Tell him you're sorry for anything you might've done but you still don't deserve this from someone who's suppose to love and guide you. If you don't communicate then it won't get any better. Good luck dear
I've answered this for someone else. But I'll say it again. you say"dad I want to look to you when I need someone to talk to and make me feel better , would you rather I go to another male who will listen to me or would you like to be the man I go to? When you make me feel I'm not good enough or unworthy I do not want to hunt for my value in someone else. Please think about that and stop making me feel like I can't come to the most important male in my life. I need a male role model and I'd like it to be you. "