So then simply show proof of where they taught what the Catholic Church teaches.
>>How about answering my challenge: Show me an Apostolic Father or a Sub-apostolic Father who complains about or condemns the practice of asking the saints for their intercession.<<
It matters not whether they complained about it or not. The fact still remains that Paul said if anyone teaches something else.
He did not. He warned against teaching another Gospel.. Definitionally, the Gospel is the life, death and resurrection of Christ. It is not the full body of Scripture.
The fact that no one in the first several generations of Christians complained about people addressing prayers to saints proves that the practice was NOT a departure from the teaching of the apostles.