I think you are getting a hard time here OP, however that might because I could have written this post 30 years ago.
i agree with a previous poster who said that you should just be really honest, with him and yourself, and be upfront that you don’t want to be with a smoker. The lying is a by product of the addiction. I remember saying the same myself, that it was the lying not the smoking, but actually I wouldn’t have been happy if he had said that he’d carry on and just not hide it.
i had opened up to him at the start of our relationship about how much I hated smoking. I had seen several relatives die as a result of it and spent the 1970s stuggling as an asthmatic child in rooms full of chain smoking relatives. He promised he would give up, then it would be when we married, then when we had a child etc etc.
i don’t what the other issues are that you hint at, however even though I was very naive when we first got together, there were elements that should have been red flags even then. He had a completely different attitude to risk in life, both in relation to his own health and other things like financial security.
it’s easy to look back and say I should have left but I just didn’t have the maturity or strength, and I loved him very much and always hoped things would change. Sadly his risky behaviour caught up with him in the end and he died 15 years ago.
with my new DP, I was on alert from the start about any addiction or cavalier attitude to his health right from the start and things wouldn’t have progressed if I had any doubts.
You have a decision to make - firstly be honest with yourself about what the real issue and then decide if you can stay with him or not.