Pastors, teachers, evangelists.....these are given to the church (Ephesians 4:11). This is not opinion, it is Scripture (2 Timothy 3:16-17). An evangelist not working as a part of a local church, in submission to others who test his teaching and ordain his work, is a heretic engaged in his own ministry and not the ministry of God (Hebrews 13; 1 Thessalonians 5; 1 Corinthians 12). The Great Commission is given to the Church -to make disciples, not to individuals because discipleship is a community endeavor (Matthew 28). An evangelist apart from a church has no biblical authority.
The problem here is you take Scripture to be opinion that you can take or leave as you seem fit. I suspect this is why your ministry bears little to no discernible fruit. It is your ministry and not God's.