JMNT(i)
11 I have become unreasonable (senseless; imprudent; foolish) – you, yourselves, compel me (press and force me; = drive me to it!) – for I myself ought to have been being constantly recommended (placed together with and commended) by you folks, because not even in one thing did I come behind (or: am I deficient from or inferior to) the "very-overly" [pretentious and condescending] emissaries (or: representatives), even though I am nothing (or: since I also exist being nothing!).
12 Indeed, the signs of the emissary (the sent-forth representative) were produced and accomplished [by me] among you folks in every [situation] of humbly remaining under to give support (or: in all patient endurance) – as well as by signs and wonders (portents; marvels) and powers (or: in abilities and capabilities).
13 So what is there in which you folks were treated as inferior, or made worse off, above (= more than) the rest of the called-out folks (or: communities), except that for myself, I myself was not a "dead weight" for (= and idle encumbrance, hence, a financial burden to) you folks? Give grace to me for this unfairness (wrong; injustice)!
14 Look (or: Consider)! This third time I continue holding [myself] ready and prepared to come to (or: go toward) you folks – and I will not proceed in being "dead weight" (an encumbrance or burden), for I am not habitually seeking your "things" (your possessions), but to the contrary, you. For the children ought not to be habitually storing up and accumulating [material resources] for the parents, but rather, the parents [should do this] for the children.
15 So I myself most gladly shall spend (pay the expenses) – even be completely spent (exhausted; bankrupted) – over (on behalf of) your souls. Even if I am constantly loving you excessively, I am habitually being loved less. (or: And since I am continuously loving you more abundantly {or: too much}, am I being loved less?)