My VX, apparently, came with the optional USDM armrest. I understand their is a longer OEM armrest, avail for an overseas market (EDM, JDM, not sure which?). Mine is USDM, and about only 9 inches long. So, my elbow rests on the front end of the arm rest. It's not really an armrest, but more of an "elbow rest". I think that the sharp/limited point of contact is what is causing the issue. I don't use the door card arm rest.
My past build, 94 Accord, came with a broken door card/sill armrest. I fixed it in a rather un-orthodox way. Let me see if I can find the permalink from that build thread...
Here is is. Everything on the door car/interior resto is on this page.
OG's CD7 Build Thread - Page 3 - HondaSociety Web Community