This is a good point you brought up. They should restrict players from attacking weak players. Like there was in Clash Of Clans. You should not be able to bully a player for long enough. There are certain flaws in the current battle system which make the game unplayable for the weak once if under attack.
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They need is a way to limit multiple attacks per day or discourage attacks with reduced rewards against greatly weaker players. That is of course if they want a bigger player base, their plan could be to setup an environment where they control all the farming, it wouldn't be the first time someone has done it.
https://steemit.com/drugwars/@martiallee/drugwars-review-problems