Straight up, man. Have the people who are whining about these slow parts ever read a book? You know the flashback parts that aren't all that exciting, but are needed for the characters and to make sense of everything? Did you not think a storyline as complex as this one wasn't going to need a few of those?
Plus, pay some freaking attention to these flashbacks, and you may find some interesting things. Notice the connection between Raimi's line at the end of this episode and his line at the end of episode two? I hope so. It was weird and unexplained in Episode two, and if it didn't stick in your memory, you may be living too much for the fight scenes and not enough for the reasons behind the fights. If you want that, go watch Dad's Home.
Not to say Dad's Home isn't a sweet, sweet flash. In fact, having gotten my Broken Saints fix, I'm going to go watch it right now.