I did a bit of research before deciding on one of the sites and SH came out on top in my (quick google) research.
Had a quick look at the other sites, but something was off-putting for everyone. With Wattpad, it was definitely the possibility of being able to comment on every single sentence...checked some of the comments and was like "No, thanks..." RR was definitely, because I didn't know if I really fit into the LitRPG-category, which was literally used as a tag in every story. For exactly the reason you mention here, webnovel was on the cancellation list.
I think it depends on what you want as feedback... from what I have seen so far, Wattpad with its inline comment option was the worst...