One thing I notice from your site is that you provide _many_ ways of giving feedback. The Discord widget, the 'Contact Us' menu item, the FAQ is peppered with communication links, there's a Forum, Wiki, et al. Basically, I'm seeing an incredibly low barrier to entry for anyone wanting to express themselves to the developers.
Have you considered paring that back? IE, ensuring all communication channels are moderated, and limiting it to only one or two services?
My team of community manager volunteers is pretty active with moderation in-game and out-of-game so it's gotten pretty good. But still, I think I need to isolate myself and the other developers from the public, because it can be really demoralizing when you spend 30-40 hours of free time per week on a side project for free and you hear some terrible things.
It's one of those things, though, that reveals the human inclination to remember negative events more even among a sea of positive events... Frequently as a game developer you will get loads of positive and helpful feedback but the small minority that want to shit on you for no good reason stick in the front of your mind.