“The many gunshots in the film are about as underwhelming as I've ever heard, even in low-budget indie efforts, sounding like little quiet pops instead of loud bangs.”
“It makes you an unthinking automaton, who will rapidly be shunned by society for your heartless or underwhelming response to everything.”
“Intermittently enjoyable segments punctuate the generally underwhelming monotony of this scatological would-be musical.”
underwhelmed
simple past tense and past participle of underwhelm