immediately after the 1982-83 series, multiple indian players claimed not only tampering, but one (Amarnath) even claimed he overstepped constantly, and even took the ball to the dressing room when he wanted to. Clearly an attempt to discredit his heroics in that series.
We all know the Botham/Imran case of the 1990s so that is a matter I don't want to touch upon here for no reason.
New Zealanders constantly claimed accused the Pakistanis of Ball Tampering as well, and mutilating the ball too.
Being blunt, it's obvious what many thought, and it's not me saying I agree that Imran was a cheat, I don't think he really did anything that others weren't doing, Holding and Hadlee more or less admitted to ball tampering, Sandpaper gate, Murray Mints and so forth, it's obvious everyone did but it's not unfair to say Wasim, Imran and sometimes Waqar were a bit unfairly ostracized for ball tampering in a way others weren't.