I've always wanted to build a fast and super maneuverable fighter but I was met with an issue I thought was annoying to solve, I build multiple prototypes with a super low wing loading lbs and it seems that when the aircraft's wings would glitch out when it reaches a certain speed. I learned that it has a relation to the size of the wing but I really hope I could build a design with good structural strength while retaining high maneuverability at high speeds. Any tips?
While, as already mentioned, structural wings are the way to go, if you don't want to or can't XML edit things, you can reduce wing wobble by just using normal wings at the points where you want control surfaces, and structural wings for the rest, combined with nudging the wing a big into the fuselage for a bit of extra support.
Just how much this will help depends on you design and just how much it pushes the envelope.
It's not a glitch. Exceeding the sound barrier at low altitude is unpleasant and dangerous. You will notice that your planes don't wobble when you go "fast" at altitudes above 20k feet.
Anyway, structural wings are the solution here. Either with rotator controlled surfaces or XML modded surfaces.
Try using structural wings XML modded to allow control surfaces