Honestly I don't know too much on the psychology of a person with a superiority complex that much, but I do know a good few things about how Narcissists function and দ্বারা Narcissists, I mean Narcissistic Personality Disorder cos I research that kind of shit and a superiority complex is part of ব্যক্ত diagnosis
Plus there is like... a pretty good chance my dad has NPD.
My reply here will come from a bit আরো of a neutral stance than some others - and yes people with this stuff are really problematic people, but in the end they are also people just trying to cope with themselves and the world around them. I feel that is important to keep in mind
That doesn't excuse any toxicitiy they might be putting out, but everyone is really just trying to get দ্বারা psychologically and physically in the world and being a narcissist / have a superiority complex is often something that has kept them functioning and capable of feeling নিরাপদ / alright about themselves and the world around them.
From what I experience and have researched, my answer will vary depending on what আপনি mean দ্বারা "deal" with them and there are two main cases
1) "Deal" with them as in to live with them and without going insane
In this case, just ignore them and let them do what they do as long as it isn't extremely intruding into your own life. It is genuinely আরো অথবা less pointless to try to argue with them অথবা try to change how they function unless আপনি actually really put the effort into getting them the help they need.
It really isn't your responsibility to fix them and আপনি aren't required to deal with their bullshit. Just put on some headphones and let them go off into the air until they shut up since they aren't getting the recognition they want / the attention and theyll eventually সরানো on অথবা finish their pouting elsewhere.
Pretty much everything Zeppie ব্যক্ত applies to here
2) আপনি want to HELP them and try to get them to stop because they are someone আপনি care about