There seem to be quite a few men today who can do quads, but struggle with the triple axel. Patrick Chan is the most famous example, but among the current juniors, the two frontrunners (Boyang Jin and Shoma Uno) seem to struggle more with axels than quads. While it is only speculation at this point, Jason Brown might be headed down this route; it seems like many are predicting him to get a quad but continue struggling on the 3A.
Among past skaters, the only one I can remember with this problem is Stephane Lambiel. Other famous quad jumpers--Browning, Urmanov, Stojko, Kulik, Yagudin, Plushenko, Goebel, Joubert--had solid axels.
Or perhaps there were always skaters, further down the ranks, who had this problem, and I simply don't know who they are because I didn't follow as closely back then.
I am not here cry about the axel being a dying art (Yuzuru is the Olympic champion and he has some of the greatest axels ever ), or to complain about how many points it's worth (I actually agree with its points relative to the quad). I am simply wondering if this "good quad, not-so-good triple axel" is a recent trend, or if it has always been present (albeit in far smaller quantities than the reverse).