Welcome to the N.H.K.

Its generally lauded as being great and while it is great, the hikikomori side is never really explored realistically. Despite his isolation he seems to have a lot of "deus ex-machina" type of encounter that throw romance, love, toxicity, friendship, and yearning in his lap.

It's a good story but not a good Hikikomori story. If you want a Hikikomori story where the MC slowly builds himself by himself, I've found "The NPCs in this village sim must be real" by Hirakumi to be way more sympathetic.