husband doesn't like my baking...

I think he is just being honest, he does not like it.
If you like baking just make him what he likes sometimes. I cant understand why you are upset, my partner is a wonderful cook, but some of what he eats I dont like, he knows this and does not take offence.
I can see this from your husbands point of view to be honest.

Yes. You are not a good baker as yet. Your husband doesn't enjoy your offerings because they aren't all that good. How did you expect them to be though? You are new to baking. Go and book yourself onto a course or more and learn properly how to bake. You are setting your husband up to fail. But he is being honest. You are not five years old. Why are you attaching so much meaning and importance on your husbands response to something you are a beginner at? Leave the poor man alone and put the hours in and training in and get better at baking. You feel rejected and hurt and low after retiring? What is this all about. Not baked goods, that's for sure.

Yeah, really think you are.
Wholemeal flour even for breadmaking isn’t always liked and for cakes it’s awful.
If he doesn't like it then it won’t get eaten by him.It’s no reflection on you it’s the ingredients and results he doesn’t care for.
If he shouldn’t have much sugar, make cupcakes, only small and you can freeze and take out when wanted.
Don’t bake as often, but when you do then make something for him and something just for you.Compromise.