Per se defamation mean damages are assumed, but if you want to get any money out of a lawsuit you need to have an account of actual monetary damages, yes Vic could sue Marzgirl and all the other nobodies that called him a criminal just to cost them money and make them suffer but for what we can see of him he is not that kind of person.
That is why those targets are probably not likely to be sued, same thing with T Greg, since he doesn't have any money suing him would be meaningless, in a cost/benefit analysis it's just not worth it.
Same with Hanlei you would need to prove someone out there who matters considered Hanleis opinion worthwhile and that Vic got damaged as a result. It's like Vic said in his deposition brain dead idiots have always talked shit about him, and it didn't matter, the reason why the Defendants are being sued is because
1. They have money, Funimation having the greatest amount.
2. They have actively interfered with Vic getting work.
3. Marchi and Rial are friends, being separate parties in a lawsuit is hell for any relationship, that is probably why Rial and Toye have been working as a singular party. If appeals court decides this passes at trial for all defendants Marchi and Rial will get into a prisoners dilemma, where they would have to trust each other, and Marchi already proved she is more pragmatic when it comes to many than Monica.
Expecting Anyone to be sue just got telling bad things about Vic is Hopeful at best, they would need to have been complicit in the conspiracy part or something like that for being halfway decent litigation targets.