How about flattering which means censorious insincerely praising as in
Many religious organizations of our time have various flattering titles and addresses which are given to their leaders such as Your Eminence, Most Reverent, Worshipful Master.
However, I'd rephrase my sentence and use too flattering a title, [the title] as in
Some have given him the appellation of the Moliere of Italy, but this perhaps is too flattering a title.
I don't intend to be rude but if you badly feel that you don't deserve this title, you can use undeserved. According to Macmillan Dictionary, if something is undeserved, you get it although you should not, because you have not done anything to deserve or to cause it as in
He has an undeserved reputation for being difficult to work with.
an undeserved victory.