If you want to see your loved one doing better, be honest with your feedback. Nobody likes to mention others’ flaws for multiple reasons. The fear of making them angry or losing them could be the reason.
We are slaves to our thoughts and actions. We are not perfect. At the same time, we feel like kings or queens in our world. Someone needs to add a needle and bust that myth.
I have been lucky that way. I had people around me reminding me of my flaws more than the good virtues. It was without alcohol so that I could respond or observe myself.