This is the 1286th most frequent Turkish word.
diyenler
"Those who say"
Here, 'diyenler' refers to a group of people who expressed a particular opinion ('saying it's a waste of time'). It functions to describe opinion holders.
Bu filmi beğenmeyenler, zaman kaybı diyenler var.
There are those who didn't like this movie, saying it's a waste of time.
In this sentence, 'diyenler' is used to label people who conveyed their thoughts ('saying it's overrated'). It acts as a descriptor of their statements.
O şiiri etkileyici bulmayanlar, abartılmış diyenler oldu.
There were those who didn't find the poem impressive, saying it's overrated.
Here, 'diyenler' relates to individuals vocalizing a critique ('saying some parts are unnecessary'). It identifies the speakers of the critique.