I agree that Liberals are handling the Electoral Reform issue poorly and that Monsef's comments were substandard even for a rookie MP.
But how about some fact checks before you get too carried away: 
                                                       Harper (9 years)             Trudeau (1 year)
Carbon pricing:                                  0                                         1
Oil to tide water                                 0                                         1
Medically assist dying                      0                                          1
CPP improvement                             0                                          1
Indigenous people relation              0                                         1
Fair?? Election Act                            -1                                          0
Refugee global  contribution          0                                          1

Make your own list on Harper's "legacy" and see how far you get.