Sometimes you need a genius, and to give them space, but effective teams are hard to build around them. That said, I've worked with people that are widely regarded as "lovely but inept" where the team has to carry the load.
@IvenBach Keep in mind that I have interviewed clowns who hold multiple Microsoft certifications and even has a master degree and was clueless on basic design stuff.
The worst are those who go all "I am TEH EXP3RT HAX0R! AWE BEFORE MY OBVIOUS SUPERIORITY!". Yawn.