Nevermind I figured out what is wrong. I followed a hunch in that the beta seemed to be performing worse than when I’d played the Steam version. So I took the mission to Steam non-beta and did the run again and it worked just fine. So I did 12 more hours of testing trying to see if a weapons load-out in beta was bugged. Spoiler - they’re not. But I did notice something interesting. Every time an F-18A took off, when it went to retract its landing gear the game crashed. This is why it seemed like it crashed 5 minutes in every time. Deleted the F-18 in beta and voila! No crash. Made a scenario with just an F-18A flying and it crashes every time.
I can’t believe I’m the first person to notice this problem, but I guess no one else want to run scenarios with every aircraft in it lol.