I"m finding that my allergies are more a function of the state of my immune system than anything else. I had severe allergies to dust, pollen and mold of all things. Like you can avoid any of those. When I went to a nutritionist and worked on my immune system, they got much better. They've been worsening again lately and I'm going to talk to my new nutritionist/functional medicine practitioner and see what we can do to improve things.
I don't think people intentionally try to make others allergies worse, but I think some people expect a lot in that area. I don't think it's reasonable to expect others to deal with your allergies. Its up to you to do your best to avoid allergens that affect you. I'm gluten sensitive and get really sick from gluten. I dont' feel others should have to try to cook gluten free for me. Its up to me to be responsible for myself and stay away from gluten whatever that takes.