Moses stuttered. Aaron built an idol. Abraham lied out of fear. David was a murderer and adulterer. Jonah ran away from God. Paul threw Christians in jail. Peter denied Christ. Noah got drunk. Rahab was a prostitute. Jacob tricked his father and brother and made favorites with his kids. Joseph was spoiled. Judah sold his brother into slavery. Sampson was dumb.
God doesn’t call the qualified, but He qualifies the called.