In the second film once you gave up the chase on the K4 and dove into the furball THAT is what screwed you there, you gave the K4 the green light to drop in on your six. Once he was on your 6 and as you dragged him and the 190 out to sea....and the CV ack, two things to do different.
1) learn to fly with out watching where you are going. Keeping an eye on the bad guys at ALL times is what is important. Flying, especially over water, is easy, avoiding getting hit a bit harder, and turning the tables on a guy on your six even harder. Had you been watching, you would have saw the 190 almost completely over shoot you which info you could have used had you seen it coming for a set-up for a kill shot. The same with the 109 once you started the scissor.
2) learn to scissor better. Scissors start out with short back and forth movements, but by watching the enemy, you can time the rolls and pulls better. The idea is to get out of sync with him. So but watching him you can pull longer to force the over shoot and get your shot, but you can't time them with out WATCHING them (see point 1)