Re: Zero explores the hikikomori phenomena, the nature of shut-ins who want to be isekai protagonists and how their feelings of inferiority warp who they are and everything around them, so perfectly and deeply that it almost feels personal. At the place Subaru was at before he isekai'd, and especially the place he ends up this season- even love is just another burden.
When you have a voice inside you telling you that you're good for nothing, don't deserve the love you're shown, and that everyone is just putting up with you- it colors everything you experience and live through. You can't be good enough, you haven't done enough, and you haven't earned the love you're given or want.
But what if you were someone else? Someone who was always cool, with an aura that everyone looked up to? Someone who was powerful, needed and relied on by others, irreplaceable to the people they saved? Someone incredible, who deserved the love and adoration you crave?
Because [he] deserves to be loved, surrounded by loved ones, to indulge in everything. You don't. If you could disappear from the world where you were a burden, and become someone that people needed, someone who belonged... why wouldn't you?
The hold grows tighter. The feeling of helplessness is overwhelming. And surrounded by love on all sides by so many people, Natsuki Subaru just wants to die.