どいつもこいつも

every one of them, all of them

どいつ who, which one (person) + も additive/focus particle + こいつ this guy, this one + も additive/focus particle
pronoun · informal Rare #43,468
every one of them, all of them Colloquial and usually contemptuous or dismissive.
JA: どいつもこいつも文句ばかり言う。
EN: Every one of them does nothing but complain.

どいつもこいつも俺が助けてやるぜ

I’ll save every last one of you!

— Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020)

カトリックの神父に限るがどいつもこいつもこのシャイアンを憎んでる

When it comes to Catholic priests, every last one of them hates this Cheyenne.

— ウエスタン (1968)

どいつもこいつも人をバカにして

Every last one of them looks down on me.

— ハウルの動く城 (2004)

正直どいつもこいつもパッとしない。

Honestly, none of them are anything special.