Ruined battery life ?

Once I got snapchat it started messing up my battery life badly. It would drain my battery so bad instantly. Then I would try to charge it and it would look like my device needed to be charged because it was showing red battery then the instantly I would charge it would be 50% "charged" the instant it I plugged it in. And now even if charging it my iPod wont turn on. It completely dead and I know its not my charger having the issues!!!

Vb 89 about Snapchat, v10.14.1.0