I don't really think there are any really bad aircraft, at least recently. Each one has a purpose and if it was so bad it would of been cancelled. However, aircraft that I DISLIKE are...:
Eurofighter Typhoon - Fantastic aircraft... but I really fustrates me when people think it's the best thing since sliced bread. Too date, it has no AESA, no TVC, and is not stealth, and is still damned expensive. Hurry up Block 3!!!
F-22 - Expensive / maintainence heavy.
Su-35 - Overhyped plane that many claim could take on the F-22... get real.
Su-27 - N001 was a joke and when people hype it up it's fustrating. Annoying when they call the Cope India exercise to show the superiority to the F-15.
[*]Yak-141 and its clones (read F-35). Why even TRY to make a supersonic VTOL jet when you have full-lengh carriers that can take a full-size fighterjet (Mig-29K on the then Tblisi / Leonid Brezhnev).
[*]Me-323: too large, too heavy, too slow
F-35B is the only STOVL version of the F-35. It's is intended to be used by Amphibious Assualt Ships and forward air bases ala USS WASP class ships / Marines. F-35C is the carrier variant and takes of NORMALLY and lands NORMALLY. Likewise, the A model is conventional takeoff / landing.
F-35 looks similar to the Yak but the method of VTOL is dissimlar.