What should you do when your supervisor suffers from Dunning Kruger effect?
This seems on the border of a &quot;Here's my story, now what do I do?&quot; type question.  But the title question seems reasonable.
If you feel like your advisor does not have enough knowledge about something to usefully direct you: first, try to get some independent confirmation that that's true.  The Dunning-Kruger effect may not be cutting in the direction that you think.  But assuming it is: you either need to direct your research towards your advisor's expertise -- this is, by the way, a quite normal process in most student/advisor relationships, as academic knowledge is vast but in order to make progress most academics are highly specialized -- or you need to find a different advisor.  In your case

At the end of meeting, after long arguments and rectifying my supervisor's hypothesis's, he claims he is the one who came up with these amazing hypothesis's and we didn't contribute anything in the research, we just did the experiments.
Now meeting with my supervisor has become emotionally exhausting and unproductive for me.

it sounds like you have lost faith in your advisor.  Consider looking for someone else.