Something went wrong with the rebounds that's obviously, but what, we can just guess.
You had 7 offensive rebounds more then your opponent, that's fine, but in total just 1 RB+..
It could be that your RB dropped when your C goes out of the game with 6 PF-s (he had 10 RBs in 35. mins)
His big guys where dominant in RB with 22 and 14 RB.
Your team had 20 shoots more in the game, so they had more chances to get defensive rebounds. (It's easier to get a def RB then an off).
Juts unlucky this game, every detail can be crucial for that 1p difference you needed for the win...
This is where we hold them!