Black Ops 1 worked flawless for me but I am aware that the PS3 version had lots of connection and hit registry issues throughout. This is exactly comparable to what is happening now which is why it's not good enough. You may not have seen it on the PS4 but relentless bugs and glitches are rife on the likes of Xbox and Steam and that doesn't mean it doesn't exist. Everybody deserves the same experience regardless of what system they are gaming on.
Also there's been more than one 'game impacting issue' - the dedicated servers were switched off for weeks at launch because of the problems on ALL systems. Many of those issues still exist today...
It's 2018 and people still shouldn't be having differing experiences on videogames. Everyone should have the same quality no matter what system they are using or where they are in the world. Rainbow Six Siege, Overwatch, Paladins and even Battlefield 1 can manage this quite comfortably and that is the standard people should expect and deserve.