not a bad ending but just a really mediocre one, it feels like nothing changed in their relationship at all and that is the most disapointing part for me the manga could go on as if nothing happened but it just so happens this is the ending, not a banger of an ending just a sad whimper.
If the author didn't spend so much time fucking around in the middle chapter maybe he could've given us more by the 100th chapter mark but we only got a side couple and almost no changes to the main characters.