Paul is not inferior to the "great apostles":
Related Commentaries of 2 Corinthians 11:5
2 Corinthians 11:5-9
5 For I suppose I was not a whit behind the very chiefest apostles.
6 But though I be rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things.
7 Have I committed an offence in abasing myself that ye might be exalted, because I have preached to you the gospel of God freely?
8 I robbed other churches, taking wages of them, to do you service.
9 And when I was present with you, and wanted, I was chargeable to no man: for that which was lacking to me the brethren which came from Macedonia supplied: and in all things I have kept myself from being burdensome unto you, and so will I keep myself.