In this case, Hate = like least
Because I don't actively hate any calibers. But there are several I do not like much, if at all, and others where I do not like the attitudes of the major proponents of the round, even though the round itself may have uses.
Also, I am a contrary fellow by nature, and often like the most popular choices less, simply because they are so popular. 9mm Parabellum falls into that category for me.
Every caliber has a niche, and a valid purpose, at least in the eyes of its designers and makers. Some however seem to have no vaid use in the real world, compared to those rounds they compete against, except to be found in a particular style of platform.
I don't have any use for the .40/10mm/41 cal rounds. A personal thing to be sure, but nothing I use a gun for benefits in any way from choosing anyone of these class of rounds, or their common platforms. I see no reason for the .45 GAP, except to sell a new model of Glock. I can see value in the .357 Sig, but not in the be all, end all attitude of some of the people who have them.
The lowly .25ACP, the most crapped on centerfire cartridge out there, still exists and sells, because it does one thing well. It feeds. Out classed in actual results by the .22LR, even in identical guns, the .25 keeps going because it feeds in those guns, where the .22 cannot claim the same degree of reliability. And a mouse gun that works is better than one that jams.
Handgun cartridges go though a Darwinian evolution process, and it is tied directly to the guns themselves. The guns go a long way to determining how popular, and lasting a round is. When was the last time you saw a new top break .38S&W? Why is there no GLock chambered for the 8mm Nambu? The simple answer is that no one (besides a handful fo collectors) would buy them.