Perhaps you're looking for overhyped? From the Cambridge Dictionary:
verb [ T ] also over-hype UK /ˌəʊvəˈhaɪp/ US disapproving
to advertise or praise something more than it deserves in newspapers, on television, online, etc., in order to make people excited about it and want to buy, try it, invest in it, etc.:
People wondered aloud whether the company had been overhyped.
Probably only one in 20 of these stocks will retain their present over-hyped levels.
Or from the Oxford Dictionaries:
Make exaggerated claims about (a product, idea, or event); publicize or promote excessively.
‘the film was overhyped by the press’
Alternatively, you might like overrated. The Oxford Dictionaries defines it as:
(often as adjective overrated)
Have a higher opinion of (someone or something) than is deserved.
‘an overrated player’