Some constructive criticism here, the way your plane flies in my game might not be same due to some mods like SMURFF but here are some things I noticed.
Your craft was quite flip happy because the CoL is above and behind the CoM when it's perfectly flat but when you pitch up the CoL deviates (I will show in pic below), also the landing gear is way too back the CoM which makes it hard to take off and makes the flipping quite drastic on take off.
So when the plane pitches up this is what happens to the CoL. It causes it to flip due to the CoL being in front of the CoM
It's pretty unstable
So the quick fix to this is, since it's a Delta Wing configuration, I suggest you pull it waaay back, and pull the wheel more to the front for better takeoff, and add a canard for more stability and maneuvrability.
So you see here, when the plane pitches up, the CoL doesn't go in front of the CoM which makes it flip. The Canards are tilted upward in order to not disturb the air flow of the delta wing.
The intakes are also adjusted to the engine.
It can pull11 Gs no problem, no flipping too.
Just my two cents here, and I provided you a suggestion on how to fix it, so I hope I dont come off as rude lol