Yeah the big three to me are the lineups against the LH starters, usage of Madson, and letting Hill leave the game just because there was miscommunication and he thought he was being taken out.
The first is the most understandable. Pederson can't hit lefties, fine. One of Bellinger or Muncy should have been in there, but then their roster was constructed specifically for that level of flexibility. Grandal forgetting how to catch a baseball really weakened their lineup too, although Grandal was a strikeout machine when he was in there anyway. Leaving that much firepower on the bench in a World Series game felt like overkill.
The Madson thing was nuts--it was as if Roberts couldn't see an earlier inning being really high leverage. Game 1 you do it, eh, ok. He fails, complains about the cold weather, and then next game its ten degrees colder, and you still bring him in in another big spot? Why? Ryan Madson's a vet with a great career but hasn't been dominant in a while, least of all 2018.
The thing where Hill comes out because he has his back to Roberts and doesn't realize its a pep talk and just walks off and it becomes "oh well, guess he's out!" would really sting if I were a Dodger fan. Were did that story come from, did Roberts cop to it? Missed that. Considering Game Three who knows what the status of their arms was (I know Baez was ruled out) so Madson is, again, odd but understandable.