im so confused?? why does the ending seem like it’s telling us the mc is completely okay...

im so confused?? why does the ending seem like it’s telling us the mc is completely okay and happy with this rs? how is he completely normal and okay in the extra?? after all he went through, it just feels disconnected from the whole story, I was hoping there would at least be a hint that the mc has gone insane or something but he really looks like he’s in the ending of a completely healthy and cute bl and it threw me off