I'm amazed at all the haters on here.....
Boiled spuds are a staple - with all sorts of meals. DH always wants gravy with them but DD and I prefer butter. Yes - baby new potatoes are lovely but big fat old ones are too! I will mash them sometimes if I can be bothered but we probably have boiled potatoes (whether old or new) at least twice a week. I do a Sunday roast each week and always do both roast and boiled.
We also eat them with fish, chops, faggots, sausages, steak, meat pies, stew/casserole/boeuf bourgignon type meals, goulash, etc etc. ( I might also do mash with those but often just plain spud).
What's the alternative? I mean pasta and rice for other meals obviously - but if you're having potatoes then it's jacket, boiled or mash? Chips are great but either take forever to make (and deep fry) or you buy processed ones, so not exactly healthy. Or you can make dauphinoise or fancy things if you can be bothered - but how often does anyone do that?
OP - you aren't wrong, and your family are ungrateful and rude! Let them cook!