How do you play the missions? Generally I usually have almost enough for the next warbond after I maxed out the last one. I did hear that this struggle usually happens when people don’t look for POIs, which also results in resources always being rather slow to accumulate.

Overall, the game encourages to not beeline for primary objectives and rather plan out a route, especially for side objectives, as they can often be further away. It does help a lot that crashed resource drops (or what they are called) have a beacon that flashes higher the further away you are from them.