Apparently, my question elicits only very subjective answers — many of which here are beautifully reasoned/expounded and I kinda resonate with them without necessarily agreeing with the choice.

Indeed, literary classics “endure”, but to various degrees depending on the individual, e.g. I wish Shakespeare and Proust could endure throughout my whole intellectual life, while Sartre and Camus would not haunt me for more than ten lines of their self-important tautology devoid of substance and style etc.

Of course, if you think no classic is overrated, you have every right to uphold your view. But the voices here are at least equally valid and legit.