ってゆーか、こうやってぐじぐじ考えるのが情けないんじゃないのか？

、？

Or rather, isn't it pretty pathetic to sit here brooding over this?

Literal

Or-rather, like-this indecisively think [nominalizer-のが] pathetic [isn't-it-んじゃないのか]?

ってゆーか is the casual, spoken rendition of というか 'or rather / I mean,' used to redirect or qualify the speaker's own previous statement. ぐじぐじ is a reduplicated mimetic for 'indecisively / brooding / dwelling on something in a whiny way.' 情けない 'pathetic / shameful / unbecoming' is a common adjective for self-criticism. ~んじゃないのか is a rhetorical negative question, used to nudge the listener toward agreement.