I didn't realize you were doing so many different things with him. At this point, I agree that what you're doing with him is counter-productive.
What do you see for him when he's fully matured? Are you wanting to show him in country pleasure? If so, to what level? Local, regional, national? These are all important things to consider. I can understand wanting to achieve that beautiful english pleasure headset (all levels included in my generalization because I love them all), but while he is still so young you need to pick one direction and go with that.
A 3 year old horse is roughly equivalent to a 9 year old child. In effect, what you're doing is putting your 9 year old in soccer, football, softball, boy scouts, and expecting him to excel in all of his school work. That's a lot of pressure and very confusing. I know saddlebreds well and they really do need that focused, concentrated direction. If he enjoys gaming, then work towards that slowly (because he's still very young and his joints haven't all closed up yet). No one will discount you for that. Of course, you know with gaming that the high headset won't serve him much of a purpose. If he enjoys trail riding, you could even work him towards competitive trial riding with obstacles and all of that fun stuff.
What I'm saying is that you need to find something specific to focus on for now. If country pleasure is it, then you need to work towards that or anything that relates very closely to that (not gaming, as an example). As he ages and matures and his training is far more solid, you can introduce all the other things. He'll have a solid foundation by that point and will be able to fall back on that as you introduce fun, new challenges. That's not for years to come, though.
Having a 4 year old myself, I know how exciting it can be and how all those prospects can seem so far away. I often have to force myself to take it slowly and easily because I can quickly get ahead of both of us. That just leads to confusion on my poor guys part and frustration on mine. I joke about my guy saying that if he fails at showing, then we'll do endurance. Of course, I focus on the show ring aspect knowing that changing his career can be done at any point in his life as long as I make sure to give him a good, solid foundation.
I hope that made sense. Again, if you decide that country pleasure is the direction you want to go in, there are MANY knowledgeable resources (like anyone telling you long line him - EXTREMELY important for all saddleseat disciplines for many reasons) on here who will be more than happy to help you.
The wind of heaven is that which blows between a horse's ears. ~Arabian Proverb