It isn't actually, you've just have to practice with the hardest AI possible in the quick battles. To me, the breaking point was playing a Kefka and Golbez Maximum AI at Vicious level. They raped me for about 100+ battles, but then came a moment when I could see their attacks coming almost every time xD
I actually use the block button more than I dodge, the hardest blocks to manage are from super fast characters like Onion Knight, and of course some unblockable BRV attacks like Firion's Axe Throw.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
