She is good, but no one picks her. Why would you pick a good hero when you can pick a broken one?
Good luck surviving against Joule, reim or GJ.
You don’t understand that the dash puts her in a bad position for a WP ranged carry like her? Idk how to explain it. As a WP ranged squishy target, you want to kite and dance around the fights because her B doesn’t have as much burst (WP), this positioning is destroyed by a dash that makes you dive in the middle of the enemy team.
Her ult is basically useless in that mode, like there is not many places you can put it and it’s quite predictable.
She isn’t impossible to use, she is just not a meta pick in 3v3, but is still viable. Just why would you pick her? There are a range of other broken heroes you can pick that are far better. She plays bad into most meta picks: joule, reim, GJ destroy her as junglers; Yates, Lance, lorelai, Lyra makes her life hell with their ability to stop her burst and cancel her dash; baron, Gwen, Magnus, Silvernail, kinetic just laughs at her; and Malene can beat her in both jungle and lane. She counters heroes that aren’t used.