OP I've thought about your situation a bit and have some questions.
When you met and married were you full of anxiety and not a full partner? Or is this a condition that happened after many years...
It seems to me that she has gotten into the mode where she has to take care of way too many things because if not her who? You've stated that you sometimes don't do things she has asked you to do. So she isn't asking you to read her mind. You've stated that you don't always do things.... Well that can be a big mess if that is kids doctors appointments, paying biils, financial planning, and such.
So she has taken over things and this includes being responsible for you because you at some point seem to have abdicated responsibility.
Getting out of this mode can take a lot of work. But it also includes you actually being a partner instead of a responsibility. Plenty of people are telling you just walk away or don't do anything. I think the problem is you stopped doing way to much a long time ago.
I'm sure at the time she wasn't given a choice if she wanted to be responsible for everything or most things.
I can tell you in my relationship I am a teacher. I take care of the bills, the planning of everything for what groceries to buy to our retirement, health care, moving, his mothers medical care, vacations and such. It can be exhausting, mentally. I have a college age child who lives at home and goes to school. I can't tell you the resentment I have watching her sleep til noon while I work and then do the dishes too.
I imagine your wife is resentful of having to bring home a huge paycheck, and take care of most things at the house and not even be able to count on you to do a few things. I imagine she is trying to figure out how you will be contributing over the summer. You don't actually get paid for the summer the school district has a 10 month and a 12 month pay option (unless your district is really weird) by choosing the 12 month pay option they just withhold some of your pay for the 10 months that they do pay you and then give it to you over the summer. You'd make 20% more if they paid you over the summer. Anyways she is probably trying to figure out what you are going to do since you already don't do 50% and now that is going to drop even further. Most people when not working also tend to spend more for entertainment or hobbies. But it doesn't have to be money based though I can say I do our money and while we are comfortable and a large purchase isn't a big deal it hurts because it effects how much I can put into savings. So if you aren't in on the financial planning that means you may not understand the goals she is setting for the family. You have kids approaching college.
Our marriage functions as a team. I do these mental tasks because I"m good at it. My husband always has the opportunity to have input into all the decisions and we regularly discuss things. As a teacher, there are times I have to work over and times he helps with my teaching chores like grading. But here we are it's summer. I have a shorter than normal break of only 6 weeks. I now do almost all the dishes, cooking and just am typing from a Marriott because I drove him to a location he had to go for his job. I drove so he'd have about 6 hours in the car to look at resumes. He needs to do some interviews but has been too busy at work to weed through the resumes. I helped him unload his equipment last night, packed him a lunch for today and will bring him dinner at work tonight or he doesn't eat. I have planted a garden as we like fresh organic produce. I am coordinating his mothers hospital, rehab and referral care as she is in stage 5 kidney failure. I'm canning up homemade soups so that when I have to go back to work he can have healthy lunches on the go. I'll be freezing some dinners as well. I did a deep clean on our bathroom and will continue going around the house all summer. So he doesn't resent me having the summer off because I make his life easier when I"m off.
What are you doing? You say you are working on it. You admit you don't do your share. How does anxiety stop you from contributing? Have you actually just asked her if it's about the money or the lack of being a true partner?
Once you two can discuss things you can share how you feel. This seems like a deep circle you are in. She has gotten used to not being able to count on you and treats you as such and you don't appreciate being treated like that. And is it just the tone? I can be brusque sometimes when I"m in a hurry but my husband knows I value him.
I feel you two are both building resentment which is a marriage killer.
And harsh or not I did mean it when I said you have maybe 3 years to fix this. When you youngest child hits 18 is a dangerous time for marriages with resentment. You are unhappy, sounds like she is too.
Someone asked about your sex life. You didn't answer but it can be hint to how she's feeling about you.