Writing communities are good. I usually do that kind of chatting on Discord these days, though Wattpad was nice sometimes for meeting other authors.
And I noticed about R4R. I got at least a thousand views on one of my short stories in 2018 through maybe 3 or 4 of them, but then when I had longer series start in 2019, no matter what I did, the stories couldn't break in anywhere and couldn't gain even a single reader or addition to a reading list. It drove me crazy, especially for the final story a few months ago.
Wattpad actually said that? They're using AO3-style "archive" philosophy as an excuse for their broken search system they haven't fixed? Actually, AO3 is a very good archive because its search options are so wide you can find pretty much anything you are looking for. Wattpad... does not.
Royal Road is a VERY narrow site and the readership is often, um, negative, but I've actually found some really OK success on there with stories that don't fit into the niche at all. My fantasy romance story has 32,000 views and most readers love it. Granted, it has 423 views per chapter which is like 1/4 of what "successful" stories do on there, but seeing as it's not even remotely close to an action adventure story with an angsty young male protagonist, I was very satisfied. I've been trying, basically begging, the staff of the site to do efforts to expand its readership past its mostly-teenage-boy demographic, but it hasn't worked so far lol
Tapas seems like the best mix, though it's still smaller than all the others. Another small but very new site is neoread. I don't post there myself but it has a good design for readers, and importantly an app.