Thats what people said about the last DBZ game that you couldn't mash your way to victory. Honestly, the series needs to be rebooted. Nothing against the game, but it could had been way better. Like Usual it rushed. The combos are just too simplistic no real creativity with them.
I have used nappa in the demo and he does have a move called hyper guard which you can use on your opponent if they are blocking, some guy hex edited his demo and unlocked every character and cards, so check that out
but yeah the game is simplistic but its a blast xd