This is true for conventional fighting games where stats and health are a 'fixed variable'. SGM is a bit different in that fighters are customizable and it is very easy to level up a team that has huge HP and Defense, have Armor, can regain health and even revive defeated teammates, all which leads to running out the 3 min clock every match. No one likes to play or watch a 'turtling' fight.
It takes some getting used that there are no TKOs in SGM. And once you appreciate that, the game becomes much more fun and challenging. GL!