We have dead weight in our Splinterlands guilds too. I've noticed players, even in T5, that sold off all cards and only play with soulbound rewards cards to gain SPS and merits. Some of the same people stay in the discord(s) just spreading negativity, the trolls, as you've labeled them.
sack them from your guild
Yes, we probably should.
Remember, this is business, and not charity. You have to make hard decisions in business.
if your limb got gangrene, you have to cut that limb