I've mostly given up on MDL ratings. For a while I paid more attention to reviews and comments but even those have led me badly astray. Three of my favourites have pages of bad reviews because I don't know, it's like the writers and directors expected more attention and intelligence from the audience than the majority of western viewers are willing to give.
The exceptions are some hidden gems with few viewers because those who seek them out are generally going to give them enough attention to understand them.
For me, it's been a long road of learning who I can trust to make or recommend quality, whether it's directors, production companies or fans, and what I'm best off avoiding.