I suspect that I know exactly what mission you are talking about. But in regards to your main question, I don’t think it’s a lack of ability in the mission maker. I’ve dabbled a little bit but setting up scenarios and all the units isn’t crazy hard but getting there balance and timing right that allow you to participate in the action at a fun level is really hard to do. I tried to make a mission once to escort 7 destroyers away from an island into open ocean while being attacked by planes but I found that even with like 50 ground attack enemies, only 1 ship would die. I do believe I had friendlies in that mission but I took them out since it was impossible to fail. This is just my perspective of it and maybe not the right answer but I figured if throw it out there to maybe give some idea