I went back to playing IV as I just wasn't having any fun with V at all.
The gameplay has a clunky feel to it which I find difficult to quantify, compounded with what seems to be much less variety in the scope of options and combos across the board for each character, it all made it feel like match ups played out the exact same way every time. I got utterly bored of it within a couple of months.
Even though I could never get along with 1-frame links and all of that FADC stuff from 4, I still find it a much more fun game to play. Plus, even today, IV still gives me matches against C rank fighters I can compete with, unlike V which consistently threw my Super Bronze ass against Ultra Gold to Ultra fucking Platinum players ranked up to the 12th in the world due to the matchmaking being a big pile of juicy shit.