待たされるの

being made to wait

→ 待つ
phrase Uncommon #9,298
being made to wait 待たされる means “to be made to wait” or “to be kept waiting”; の turns the phrase into a noun-like expression.
JA: 長い間待たされるのは嫌だ。
EN: I hate being made to wait for a long time.

待たされるのは嫌いです。

I hate being kept waiting.

私は長い間待たされるのは嫌いだ。

I hate being kept waiting for a long time.

君は待たされるのが好きですか。

Do you like being kept waiting?

彼はそんなに長く待たされるのに耐えられなかった。

He couldn't stand being kept waiting for so long.

待たされるのが嫌なんです。

I don't like being kept waiting.