Chapman pitching Game 6 was dicey but understandable. If you don't trust any other reliever - the cost of a loss was so high that managing like it was the last game of the season was justifiable (because it was). After all if you put in (anybody else) with a 5 run lead, and he let a run score, then pulling the alarm for Chapman would not have received any comment at all.
He obviously was gassed in Game 7 - coming into a situation with a runner on was tricky as he resorted to a fastball he couldn't command. When he went slider heavy (like in the 9th) it worked.
The bunt with Baez was dumb - but Baez looked totally lost at that point, so a bunt almost made sense. Heck, even pulling Hendricks quickly was fine in theory (again, trying not to be greedy) but he was so hot, should have at least given him a look at the third go through the order.