noobs, you just don't know how to play dagger, you need to spam sand bomb as aoe disable.
Jokes aside, dagger is not suited for mass pvp, it's just not what the class is about. For me dagger is all about the Albanian playstyle. Find vulnerable enemy, hide, backstab, get frag, spam taunting macro with %target in white chat, and bsoe before reinforcements come. Rinse and repeat. Also they are neat for 9v9. Hero dagger is not bad here, the damage is insane especially after zaken patch, but they are still overshadowed by the versatility of the tyrant.