how to avoid conversation with your father with not hurting his fellings
Don't. Do you know how many people in this world would kill to just have one momment with their fathers again? You're blessed to still have your father.
He just wants what's best for you. Put yourself in his shoes. They say you don't understand your parents until you have your own children. Don't wait for it to be too late to realize that your father is irreplaceable. He may not be right all of the time but at least give him the credit of having good intentions. You look like a decent young man. I know you can grip what I'm saying to you.
If you think you have a bad father, I can honestly tell you that if they had an award for "world's worst father" my Dad would win. He neglected 8 of his kids shortly after his wife's passing. The only time he calls us is to ask for money to support his new wife and two new daughters. Eventhough he put us through so much financially and emotionally, we still love him more than anything because we know deep inside he loves us. My brothers (who are hard-core) can't even talk about him because they'd drown in their own tears from missing him so much. Parents may not be experts at showing us their love the right way but you may easily catch their traits just as they've caught their parent's. We expect a lot out of our father's but try to keep in mind that they are only human and will sin and have imperfections just like the rest of us.
Take care and remember to thank God that you still have a father.
Don't avoid confrontation. Avoidance simply prolongs the underlying conflict. Try to understand him . Don't avoid conversation with him. Imagine if he died tomorrow, what you would want to say to him now.