>>281434538
In Japan I'd say, it keeps happening, in Medaka Box all these best friends don't see each other for a DECADE, even the protagonists who had declared multiple times love to each other and the promise to marry.

It has the longest epilogues I have ever seen (I haven't read Gintama yet though) and they still forgo a lot of shit.
>panel highlight problems created by the series which are barely adressed or solved

They have this terrible problem where they think that lampshading makes it ok for a tired trope to be there and is funny how people on 4chan may be quick to call something reddit or Marvel like for having quips and so often you see stories where characters are poisoned by Irony.