Sound completely wrong to me... my VX (before the motor went) got around GREAT in the snow... I was TRYING to slide and had a hard time doing so... heck, I was driving regular freeway speeds in a snow storm that had everyone else doing 20-25 mph... I LOVE my VX in the snow... I just hope that i have the new motor in before the last snow... not gonna be in time for the NEXT one... expecting to get 8-1 5 inches fron Saturday night thru Monday sometime... gotta love it! Sounds to me that you need new tires. As for ABS... even in good conditions I think the ABS is sketchy... don't care for ABS on any vehicle... I am from the school of pumping my own brakes anyway... I don't need no stinking ABS. I know of a couple other Isuzu vehicles that have had ABS problems... not the VX... but Amigo and Rodeo have had service bulletins on the ABS... if not recalls.
Anyway... get new tires... get some practice... if it keeps slipping and sliding like that, I'd consider having the TOD checked out. I wonder if the TOD display could be displaying what it SHOULD be doing... even if its NOT doing it... if that made any sense.
Good Luck... TTYL!