If they put themselves out there, acting in the way they are(privileged, entitled, pampered,and on Instagram!) the they are setting themselves up for comments and opinions from people who dislike their actions and are disappointed in what should be a dignified royal couple.
If they provoke strong feelings it is because they choose to act in a certain way...of course we respond , and of course a lot of us are very unhappy ....it's not jealousy of vindictiveness...its deep disappointment, particularly at their hypocritical actions.