"Pride leads to conflict; those who take advice are wise." Proverbs 13:10(NLT)
It's okay to admit you don't know everything. No one will be surprised because none of us knows everything. We all have strengths and weaknesses, and we all have different experiences, skills, and talents. What is disturbing is that some people would rather fail than seek help from someone else. They can't bear to share the credit of success with someone else, or to admit they aren't perfect.
Think about it. If you refuse every suggestion that someone gives you, s/he will soon stop making suggestions and just let you do it your way. Win or lose, the outcome of the project becomes your burden alone. Not only will you get all the credit for success, but you'll also receive all the blame for failure. How will you ever grow as an individual if you never learn new ways of doing things? Abundant life involves growth and development.
We can learn, not only from our own experiences, but from the experience of others. Take time to listen to advice from others. I'm not suggesting that you can use all the advice you're given, but at least find out if you can use it before you refuse it. Sometimes we allow our pride to drive a wedge between ourselves and the people who can help us. Begin to have discussions with those attempting to advise you. Find out if the suggestions are viable, or how they can be altered to work in your situations.
Seek God's counsel above all else. Ask Him to guide you into the proper place with the right people. Line up with His Word, and pray without ceasing. If any advice is contrary to God's Word, you MUST discard it. Pray for discernment and wisdom in all things.