My take on CoD...

[redxfred]

If you don't like it at all, try some other flight sim. But, for the best battle of Britain vicarious thrill, try some of the improvements available for free. I recommend the Team Fusion "Mods" available after a quick search online.
I am basically an off-line Spitfire enthusiast, and have seen none of the barrel roll crashes you have experienced. It may be the different type of planes you prefer to fly because I have found that they frequently have different features and flight characteristics. For example, Spitfire wheel brakes are either on or off, while the BF-110 has proportional and separate brakes. I have learned to "tap" the Spitfire brakes in order to continue enjoying all the other good things about CLoD. Perfection is hard to find.
Perhaps you can discover the "Mod" out there which will correct your dissatisfaction. Try to fix it...

[Igo kyu]

For me, the RAF campaign is too short, and too silly in parts. CFS had more realistic missions, and almost more of them.

[Continu0]

If one wants to play CoD, he has to do something for it.

For offline-players, Heinkills Camaigns or the Add-ons from Desastersoft are perfect. Well made missions, real content.

As for UFO-AI, that´s just a problem with setting the AI-skill-Parameter. They are set wrong in most missions already included in the game. But with the earlier mentioned Campaigns/add-ons, you shouldn`t have a problem...