Using 'overcompensate' may suggest someone is insecure or has self-doubt about something. She often speaks loudly to overcompensate for feeling ignored as a child.
Pro Tip 2/3
Negative Connotation
'Overcompensate' typically implies trying too hard in a way that might be unhelpful or make things worse. After messing up the presentation, Joe overcompensated by emailing everyone daily updates.
Pro Tip 3/3
Not Always Visible
Overcompensation can be an internal process, not always seen by others. Though appearing calm, she's overcompensating internally for her nerves.