IMHO Quest 2 is just not good enough for DCS. The resolution is too low to see fine detail in small objects, which is what you want here. That's why most mainstream VR games have cartoonish, stylized graphics.
I have Pimax Crystal, and the improvement is absolutely huge from Q2. This is very expensive, but Q3 will already be a big improvement, and is an affordable and generally good headset. So yeah, the only answer is a new headset.