Ugh. I hate putting myself in the position to be interpreted as playing apologetics fortthe tankies - seriously, fuck the tankies and the nazbols - but conflating the use of the software with the creators politics isn't a winning stance. Not when people have been using Reddit for the last decade, which has been propped up over the years by the likes of Peter Thiel and more recently Tencet.
The tankies are denying China's genocides right along side the major investors in Reddit, and the nazbols want the same as the actual Nazi billionaire that lifted Reddit into prominence, only under a different logo.
There's no reason to avoid the software, really. And there are good sites using it.