Yeah, Ike dominates mediocre players and he has like over 9000 players using him, including some amazingly awesome pros.
AGAINST GOOD PEOPLE WHO KNOW HOW HE WORKS HE IS THE THIRD WORST CHARACTER IN THE GAME K?
Most people are not good at this game, and even the average professional for this game really just isn't comparatively as competent as professionals for other games. The average player is horrible at deliberate powershielding, establishing solid traps, zoning correctly, edgeguarding/recovering intelligently, and other things that specifically are very exploitable against Ike. Besides Ike being exploitable on reaction time, he has little real way to consistently capitalize on any advantageous positions he's in because his mobility sucks and because he's super laggy and slow on basically everything (besides his Jab, which is really not as amazing as people try to say it is). Ike happens to have significantly above average representation and a massively overdeveloped metagame.
I mean if Ganon could throw out a move that didn't get ***** by spotdodge on reaction, he would be better than Ike. Ganon has better tools for punishing and trapping and setting up into something that can finish off his opponent. He's only worse than Ike because he's more gimpable and well...has more trouble starting anything on a good opponent.
Oh yeah and Ike clearly loses against Link...who for SOME REASON is ranked lower than Ike. I think Link is actually better than Ike, despite clearly being horrible overall. Ike is just too godawful on the other hand. As for his other matchps in low tiers (or other tiers for that matter), I really can't see Ike having the advantage against anyone...arguably he might win against Captain Falcon just because there is just too much technical demand for Falcon to easily outdo Jab walls. He's just too easy to camp and shut down once you powershield him (yeah so I heard ADHD powershielded 80% of Rykoshet's F-airs...using the ICE CLIMBERS) and realize that his Jab is not safe on block. He's the most linear character in this game by far.