Ngl, your post comes off as bitter. I get it, having someone relo their house onto a plot that you and several others were waiting on is frustrating and irritating. But you have to remember that that same person probably went through the same thing and suffered for it.
Relo in itself is not an issue. Because it opens up, another plot so it's not like anyone is taking another plot, they simply moved to another one.
Rather than sit on a plot that you want, you should probably find somewhere with less people and get your better chances there and relo to another location that you like better.
Housing is rough, but deleting relo or punishing everyone for it is unnecessary. Because in the same breath, once you get a house, you'll be glad relo exists.