Apparently most CUP planes are completely ineffective against other planes in the hands of AI pilots. Probably some combination of AIs struggling to fly the planes at all, and/or failing to use some weapon systems correctly. Some of this might be fixable in config, but it's the usual undocumented Arma bullshit and we don't have an expert. Another option would be to swap out the planes when spawned for ASF for ones which the AIs are more effective with, for example the vanilla planes or the CUP Harrier.
Apparently most CUP planes are completely ineffective against other planes in the hands of AI pilots. Probably some combination of AIs struggling to fly the planes at all, and/or failing to use some weapon systems correctly. Some of this might be fixable in config, but it's the usual undocumented Arma bullshit and we don't have an expert. Another option would be to swap out the planes when spawned for ASF for ones which the AIs are more effective with, for example the vanilla planes or the CUP Harrier.