I am having a similar issue in HM with people attacking me when I have no chance whatsoever.
I had a defense army, but when I saw that they plundered me regardless, I removed everything, because if they have no respect then they'll get no points. After all, that means that they would want a defense army + a plunder EVERY day knowing that I have no way to defense myself ? Come on... let's not be silly, I'm not Santa Claus.
I have put in my profile that I'll put a defense army when they stop plundering me.
Some have but some keep on battling for 216 points and plunder, I am set up in a way that I'm here to collect but there's not a lot of options either for long periods of time... 1h, 4, 8, 12... if you can only do let's say 9 hours later and 12 hours is too late then you have no chance to keep your stuff safe. Ditto with houses, they are done whenever they are done, and not set up.
So i understand your pain and sadness but sadly that's going to be this way until they have decided that they have enough