she did a lot of good on COunter-Earth. She's the reason why Graviton was defeated. She was majorly traumatized when she realized that he'd killed a woman she knew. In Avengers/T-bolts the reason she had her breakdown was because she was taking steps to make sure Zemo didn't go bad. Plus according to the people who wiped the stone the reason for the residual personality was because she asked it to take over. She didn't trust herself.