Looking at the last time this happened to you, the two players who fouled out hurt you pretty bad. Thier two top scorers were thier PG and SF, the exact two positions that fouled out on your team.
This is getting close to the truth. I believe you are playing mostly "let them play" for foul trouble. I would suggest "sit them" if it is a game you want to win. Once a player has 4 fouls, his defending is much lower.
This also showcases why having good backups is important.
Run of the Mill Canadian Manager