I am making a small gunship, and am having a few problems with its movement

First of all, if it flips over at all, it's basically hopeless to right itself again, and wont stop pitching forward under certain circumstances

Secondly, It seems to flip over a lot in the first place, which is a big problem relating to the first issue.

The craft has PIDs for every orientation, but they are likely not correctly set up, as I don't really know exactly how they worked, so I just tweaked things until it looked right, which may have ended up screwing something else up. The AI has hovercraft maneuver, and has the 'point at and maintain distance' behavior, neither have been modified very much.

Here is the design if you're interested in looking at it for yourself
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1880690071