You know, your talent for making people angry is second to none.
Literal
You, people [object-を] make-angry talent [only-だけ][topic-は] number-one [confirmation-だよね].
おこらせる is the causative of 怒る 'to get angry' — 'to make someone angry.' ぴか一 (ぴかいち) means 'number one, top-class' — originally from a card game (花札) term for the best possible hand. だけは 'at least, only' with contrastive は implies a backhanded compliment: 'this one thing you're great at.'