Hooray for internet anonymity!
I honestly don't fear this stuff, because even if my work gets really popular, that doesn't really mean I have to commit to making more stuff (or a certain quality of stuff) or change the status quo of my life. Except for criticism. Anonymity doesn't shield you from criticism
(As for attention, that's basically equivalent to the 'success' I'm aiming for in the first place XD)
I guess I personally aim for the success of each individual story, rather than being successful as a creator. And as far as I know, once a story is finished, its ongoing success/visibility if really out of your hands; most finished works only have a period of fame for like a year or two and possibly get brought up years and decades later as a classic if you're lucky.
That's all I really want; I don't particular care to be someone who consistently puts out successful content to sustain my personal success, so this isn't really a fear of mine either 