The away side were 2-0 down after 28 minutes, although an Alex Baptiste goal just before half time did give Bolton hope of a comeback.
However, two further goals in the second half for Blackburn condemned them to their third league defeat of the season.
"Individual mistakes cost us dearly. At 2-1 at half-time we had opportunities to make a game of it," Freedman told BBC Sport. "All in all, I'm disappointed in the result and the individual performances.
"We are only five games in. We have had a tough sequence of games but we have to look forward. We have to try and recruit, which is difficult.
"We have to bring in a certain type of player who shows enough hunger for this football club."
The Trotters are bottom of the Championship table.