OP - omg, of course you're not being unreasonable!!
I feel like certain things become the status quo in relationships, and it seems like your DH assumed this was one of them. Maybe selfish, maybe just neurotic/over-eager - you know him better than strangers on here!
For sure, it takes some headspace to plan a holiday. But you don't have to go to DH armed with a list of alternatives to have the conversation. Just tell him you want to leave room to plan some different types of holidays together from now on. And cancel some of the pre-booked ones to make the room for that!
Holidays should absolutely be a balance of what you all want! My DP likes luxury, food, drink, private pool, etc. I like exploring, sightseeing, hiking, activity, excitement. So we always plan our holidays with a mixture of stuff he wants, stuff I want, and stuff we both enjoy. From the destination, to what we do there, and the actual accommodation itself. It's not the unilateral decision of one person. Though I tend to do all the research/planning, and he does all the booking/logistics. But we decide together.
Also, don't feel embarrassed about wanting a washing machine 😂 We have a dog and take him away with us in the UK. Once spent two weeks in Devon/Cornwall trying to shower bloody sand out of his harness every day, mud off towels and clothes, etc., in a place with no washer/dryer. Never again, dear god! Washing machine is non-negotiable now :) Even when we go overseas, we usually do some laundry as we prefer to pack super light. It's not weird. Just personal preference!
I would just talk to him and tell him how you feel. Tell him what you've told us. :)