Juventus is similar to AC Milan, with problems changing from attacking to defense at different matches. When they scored goals, their bad defense destroyed advantage, and when their defense shown off well, their attacks failed to score winning goals.
This season perhaps both Juventus and AC Milan will hardly to enter top four and it will be a disapointed season for both of them.
Both teams do look like that because sometimes they play well and then lose the momentum to maintain the victory in order to get points. Juventus' defense is actually good, but they fail to score goals at certain times so that many matches end in draws. AC Milan is indeed in a slump and maybe the arrival of a new coach will not necessarily be able to change the pattern of play for the better in the future.
The draws obtained by both teams can be a basic reference where when they face a much weaker team, they do not take advantage of the momentum to get full points, especially AC Milan who are playing at home.