Imagine that someone tried his hardest to write a story where the protagonist is a complete retard (well, a well-meaning complete retard) and proceeds to brutalize him repeatedly both psychologically and physically through the cliche'd "every time he dies he resurrects" to a point he feels like a schizo. It feels mean at times, like the author hates the poor retard.
Add to that a love story that's even more badly written and embarrassing than the usual trash slop (the half-elf or whatever is barely sentient) and plot developments that are essentially completely improvised and made up. Ah, also the author hates that the public loved the demon maid character (a psychotic stereotype, but hey, maid dress I guess).
The only redeeming factor in Re-Zero is imagining the point of view of the characters that do not know the protagonist is a die-resurrect time-loop guy: imagine for a moment that the schizo you met for like half a day started screaming how he loves you and you lived together for months and he understands you and can't live without you
True schizo hours, I guess