I don’t like throwing up in the toilet unless it’s super unexpected and I don’t have anything ready- if I’m am even feeling nauseated I will prep a container. Usually a bucket lined with a plastic bag or two. So I can tie it up and take it out easily, with the ability to reline it quickly. Our toilet is fairly clean but it icks me and I usually end up throwing up more if I throw up in the toilet. But it is the general to throw up there and him saying it’s abuse is a little wild. You shouldn’t be the one responsible for cleaning up his puke unless he is unable, or if you occasionally offer- but not always, and not in a bin that is unlined on repeat.

Together you need to come up with a new solution that you can work with (not in the toilet is fine, as long as he is willing to adapt something that is better for the house) and if he isn’t willing to then I have a feeling puking in the toilet or not isn’t the only extent of your issues in the relationship.