Hardly generic- it is somewhat generic after what has come since, as there has been so much cheap copying of the original.
Yes, a definite instance of the "Seinfeld is Unfunny" Effect.
https://tvtropes.org/pmwiki/pmwiki.php/Main/SeinfeldIsUnfunn...
In Blade Runner's case, the art design is superb. As I mentioned in my parent comment, that's not what I referred to as generic. The script though is what is generic and ham-fisted compared to the novel. It's also not a case of that meme, as I was comparing to the novel, and to earlier films which it is derivative of while taking just the skeleton of the plot from the novel.
The art design, which is the most influential aspect of the movie, is superb, but compared to the novel, the movie's script is that of a generic thriller.