VTOL pitch controlling

Hello friends,
I am working on ZMO VTOL using Pixhawk 4, currently I am facing two problems the first is
When my ZMO VTOL leaves the ground in Q_Stabilize mode it oscillates the Pitch up, down and pushes back the VTOL during takeoff I have changed different parameters for pitch the controlling in mission planner but the issue remains same. But when I hold the pitch stick up it stays in its position.

The second one is it has the stability issue. It doesn’t maintain the stationary position when it takeoff, I have also changed PID’s setting but can’t be able to control in stable position.

I am attaching full parameter list as well.
Parameter list: VTOL parameter - Google Drive