You should just leave the shade. It is an installed fixture, specially installed at your request.
You should also accept that the landlord is not jerking you around with the rent. Montana is a state where rent is rising faster than inflation, and in some cities and area QUITE a lot faster. There is a lot of reasons from that ranging from affluent white flight to less urban areas of the country to nimby and ecological opposition to lower cost new dwelling units being built.
Whatever the reasons, and there are many, rent is going to rise in Montana for the foreseeable future.