Looks like a tactical loss for Brazil imo. They get to train their bench and at the same time helping a weak team go to the final round. Not bad.
Murilo should've played better. He was probably nervous starting ahead of Bruno.
I have two questions for you.
1. How exactly does it look like tactical loss? What are the common patterns when Brazil plays to lose? Specific models of serving, block-defense or other behavior that you could distinguish as uncommon after careful statistical analysis?
2. How do you define "weak" for teams? Bulgaria has been consistently among top 8 in almost every competition since 1950-s, since 2006 in top 6 in every competition with 2014 WCH and 2016 olympic games as exception and with three bronze medals and several 4th places. Currently the team won against Russia, the World and the Olympic champion.