I feel bullied when I die to the same stuff every time, but it's more like I suck at the game.
V-Trigger Birdie gains movement speed as well as damage to EVERYTHING, not just his headbutts. Not that it did me any good.
It's really scary.
The typical game plan for Mika was working well against you, since you were very frequently in the corner. I'm not great at giving advice and I know very little about any character that isn't Mika, but I would say you weren't scared enough of her command grabs. After the charged dive kick, you would pretty much always just stay blocking on the ground, so I started to exploit that. The same for when you were in the corner and I would tick throw all the time. It can be scary in the corner because of Lady Mika, but you should at least be neutral jumping more in general against her.