Thing about this offense is you don't need some dominant big man playing the inside. You just need someone with good basketball IQ. A center doesn't usually play the low post, in this offense, he plays the high post mostly. Why? Because it's a motion offense, he doesn't play down low because that limits the space needed for off-ball movement and space to drive.
There's nothing wrong with that kind of offense. It only becomes a problem when players aren't executing and hitting their shots. We created plenty of opportunities, they just didn't score.
You can see what a successful form of this offense looks like when you watch a team like the Denver Nuggets, who do have a great big man in Jokic. But notice where and how he plays his role in it.