True but the OP stated in a subsequent post that this is not his style and would not do it even in the future. His loss. End. Of. Story.
No, it's not the "End. Of. Story.", this is a
discussion forum.
This discussion is valuable because it reminds all of us to be extra vigilant during what can only be properly called a negotiation.
In my opinion the OP should have gotten more and was taken advantage of by a GA who missed an
opportunity to deliver excellent customer service. The GA could have given a voucher, or confirmed an upgrade to F on one of the segments, or some miles. To have done so without being asked would have been in line with DL's overall fantastic customer service reputation. That reputation can easily be tarred by little things like this, and is worth much more than the few hundred dollars of e-credit or the free upgrade to F.