@Dekram: Because olimar is dumb, he is stupidly hard to approach, mistakes against olimar can cost in the upper 40%'s, and he kills at 80.
Meanwhile he only has to approach maybe Falco, approaching olimar on the ground is insanely difficult, approaching him from the air is impossible except for MK who still has a really difficult time.
And he's not really that hard to play, anybody can pick up olimar and pivot grab/Upsmash OoS and do well.
His only flaw is his recovery which is still really good if you do 3 things correctly. DI well, save your jump, and whistle.
Zyth is really bad at all those things and can't Jump canceled Upsmash out of shield, which is why he gets bodied and thinks the character is fair.
Btw nice to meet you, I'm tutu, I main sheik and am eternally bitter when I lose to people I consider worse than myself because they main a character that +3's me. I also have a tendency to excaggerate, but when it comes to MUs I'm always right.