Feels like if I tried harder things could be good
Thinks every person who is being controlled but probably doesn't realise it
. It can be so hard to see when you are with them - they keep your head filled with them, constantly worrying about how you can make it better or get back to the good times intentionally, so that you don't have the headspace to see their behaviour for what it is. Those good times were also engineered by him, he took them away little by little so you didn't notice how bad things were getting.
feel I changed to keep the peace
When you find yourself changing your behaviour to avoid theirs you know there's a problem.
Yes I think if anything I think I am a better me have done work on myself and can set boundaries and knowing who I am. I even have a much better job now with my confidence growing but he doesn't seem to see any of this as a positive
Because he doesn't want you being you and having boundaries. He wants you doubting yourself, feeling insecure so that you rely on him all the more, even though it's you doing most of the housework and paying for things.
Don't tell him you think he's controlling you, he'll just have all the right answers to stop you talking, or he might well escalate. Talk to us or your therapist. Realise that he's very believable in what he says, very convincing, but if you start watching him with 'seeing' eyes you'll see the pattern. Women's Aid are very good if you need some RL support.
I'm sorry you're going through this, it's horrible, but you're already on the path to being you again, keep your strength, make your own decisions, you can do this 