FLYBOYJ
"THE GREAT GAZOO"
For the most overrated my vote goes to the A6M Zero.
I tend to agree - there was much hype about the Zero and its performance (Especially after Midway) but I believe much of that hype was based on propaganda (make your enemy look formidable and it serves well with the public when you win a major battle).
As we know "Bloody Shambles" does a great job in documenting the Zero's combat record early in the war, and although Zero equipped IJN units did well considering their logistic challenges, the end result did not coincide with the hype and as discussed many times before, there are many reasons for this.