In addition to being overly confident control freaks, Leo and Scorpio both love attention and crave being number one. This can end up in some nasty clashes and both signs feeling like they're not getting the form of love that they need. If heated arguments on a daily basis sounds like fun to you, maybe this relationship would work! For most people, it is doomed from the start.
Leo is a fire sign, while Scorpio is water, so you can see why there might be some problems with the match. Water signs are emotional, sensitive, and require a lot of assurance to ease their insecurities. This tends to clash with the fire sign's aggressive and independent nature. Leo doesn't even think about how Scorpio is feeling, while Scorpio's constant need for validation can be annoying to Leo.