There are many ways to skin a cat. Some of them quite messy!

Likewise, there are many ways to complete a reasonable Gybe. Some get messier than others more often.

The videos above show some quite different methods, all working quite well.
Because we are all windsurfers here with some skills and habits already ingrained, there is
no one answer to 'how do I do a better Gybe.'
Also, the type of gybe that suits your conditions and sailing situation best could vary a lot. A serious Wave Sailor will do it differently from a Slalom Sailor from a High Wind Speed Sailor from a Bump and Jump Free-rider etc.
For instance, one answer is to decide to do it the hard way and forget everything you know and start again from scratch with a particular method in mind. One that you think will suit your conditions and abilities best.
Yeah, I know. That approach is probably not going to suit anyone without a serious dose of OCD and a hell of a lot of time and wind on their hands. It's always to hard to completely reinvent the wheel!
So the logical approach, is to get a good coach/teacher to watch (with no particular method to push), and have them analyse what you are doing now and suggest some areas and directions to work on to nudge you in a better, more consistent direction. Ideally, with regular follow ups to tweak your progress. Video could help a lot but it need to be in the right conditions, from the right angle and analysed with a particular goal in mind. :-)