Why does everyone hate aquifers?
Unlimited water and drainage are only benefits if you plan on using 'em. Unlimited hazardous terrain and job cancellation are pains in the ass no matter what. And a first year that goes poorly can break a fortress, there are no buffer zones and little margin of error.
I don't hate the things, but I do consider 'em a nuisance a lot of the time. I can see why they'd bother some people more than they do me, though.
I've just started playing. I don't even know how channeling or the physics of this game work so I can't possibly get past any aquifers.
Try embarking in a location that covers multiple biomes, one but not all of which contains an aquifer. You should have a safe easygoing spot to dig early on, but you can go looking for the groundwater after you've got some safeguards in place.