We have every right to demand what we want. Nothing in the world would change if people were not critical like you and just rolled over and played dead. We can't force him to listen. That is all you can say. But it is critical to voice our concerns and in a unified manner as to at least provide motivation for change if not the change itself.
Besides, how do you know what choices were in front of him? Where you there when someone said "he, this thing sounds pretty distorted, how about this version without that?" Two possibilities: that wasn't told to him in which case, he was not given a superior choice that would have both served his needs and ours. Second, that none of the people involved can tell what is quality execution and what is not.
Nothing wrong with being critical of the production quality of an album or song. I do that all the time with friends. And I'll give you point for that, yes, If you actually know the production process, we as audio professionals may have some recommendations.
Once one of my artist friend (Indie, assume lo-fi) decided that he would mix his album himself. The result was so so, and it did not achieve the success of some of his previous work, we are still talking very modest success here. But. He came to decision after sending the stems of a track to a few established mixing Engineers. I also made a mix for him although it's not my main line of work. He didn't like any of them. Some of them where way better than what he had the chops to achieve, but still. That's not what he wanted, his vision did not translate. If you ask me, yes this was a mistake. But he is the artist. Not me.
Sure enough, like you, after seeing him struggling with his mixes, yes I even, like you, suggested. "Hey I think you should really get monitors with better bass. It's a mess down there" He was mixing on cheap Yamaha HS5 which i some way follows the tradition of NS10.
But thing is. I had insight on the process. It is a close friend.
You have zero insight on the production process of the Weeknd, and you have zero experience on producing an album. Yes you have all rights to know what you like to hear, no problem there but you are not an authority on that. And you certainly cannot know that these production decisions where made simply because he couldn't hear the truth due to a poor reproduction system. Sorry this is nonsense.
Do these production critics with your friends, that's not why we come here. That's not your expertise, and if you really think your opinion matter on this. Well, take appointment in these studios, and teach them how to produce an album, but don't tell us, your community that you built based on your expertise in hifi reproduction and measurement, that you know better. That is extremely condescending.