When it first popped up I made an account and took a look. I liked the 'free speech' and 'all are welcome' sales pitch. But at the time it was mostly vacant, and I didn't really like the layout.
I've gone back a couple times to have a quick look, and it's getting ugly. Maybe I'm not setting up my account or preferences or something, but when I logged in and clicked on 'categories' then 'philosophy' and got a page full of images with memes and other empty content. When I clicked on 'science' I got a page filled with discussions about gender or climate change, and nothing else.
Did I accidentally put gab into voat-mode?
Also, it just doesn't have a community feel. More like being in the midst of a mob. There's no compartmentalization, it's all one big group rather than a union of smaller groups.
I don't get it.
What's the appeal, or what am I doing wrong?
I suspect that a good fraction of the really toxic people there are shills; their job is to discredit the site, and make it uninhabitable. Not just by posting the Nazi memes, but the stuff you described that breaks the sense of community - posting the same garbage in every group, arguing, and upvoting each other to create the illusion of support.
I suspect this might be happening to some degree at Voat as well. It seemed pretty clear that they were under concerted attack for a while, with the DOS stuff, and also posts of illegal content that were instantly reported to their hosting company. It seems reasonable that shilling would also be expected.