何が言いたいんだ

what are you trying to say?

→ 何
phrase Rare #27,318
what are you trying to say? Often used bluntly or confrontationally when asking someone to clarify their point. Depending on context, it can also refer to what the speaker was trying to say.
JA: 結局、何が言いたいんだ?
EN: So, what are you trying to say?

で、何が言いたいんだ?

So, what are you trying to say?

— ミスティック・リバー (2003)

何が言いたいんだ?

What are you trying to say?

— ザ・マン・フロム・アース (2007)

一体、何が言いたいんだ?

What on earth are you trying to say?

何が言いたいんだ

What are you trying to say?

— M - Eine Stadt sucht einen Mörder (1931)

だから、何が言いたいんだ?

So what are you trying to say?