I think this is a response for me. I also think I might have explained myself poorly or at least far too briefly. I apologize for that and I'll try to clear it up a bit. 
Others' enjoyment isn't and never has been my primary goal. I'm working on a story I deeply love, am proud of and really enjoy making. It's for me first even if I truly appreciate each and every subscriber. But I haven't been drawing comic for that long yet and I am still insecure about the execution of it. Especially as I'd love other people to enjoy it too. And I'm still learning the trade.
And that's what I mean when I wonder about doing something wrong: if I presented my ideas poorly.
Maybe the dialogue was choppy or too cliched. Or maybe I wasn't able to draw interesting enough layout. Maybe there was something jarringly wrong with the anatomy / composition. This is very good thing in moderation as it pushes you to analyze your work and that's necessary when you want to improve. And I really do. But I have a tendency to over analyze things from time to time and sometimes a mass unsubscribing may happen at a time when I'm already thinking about all the things I could do better and that's when it makes me a bit anxious as it seems my fears are valid. Which I logically know isn't correlation to it and most of time I'm able to separate them. Subs aren't death and life situation to me. But a part of them is tangled up in other things that have nothing to do with subscribers and that's why they do can affect me if it makes sense...
Like, there are 9 other things that are making me feel anxious about the quality of my work and 10th is the sub count. And sometimes one part of that tangle can pull at it and create the reaction. And as I'm going to be graduating in art field (not comics tho) this spring, I can't think only about my enjoyment but also about possible buyers / funders. Basically, I'm just in such a transition phase that things like this do affect me at least mildly even when I'm loving working on the story with my full heart.
I hope that cleared something up. Or maybe I just made it more confusing... ^^' It is a very confusing subject for me and nothing clear cut or something that happens every time I lose a reader. After all, everyone is free to read and stop reading whatever they want for whatever reason.