My method: click that "post" button, leave it be for a while, go do something else, get distracted, then come back after a few hours or even a day. More often than not you'll be surprised by the positive reaction
^ This, right here.
I also refrained from posting for a long time. My idea for the story dates all the way back to 2014. It wasn't until 2017 that I found the courage to start drawing the first page. And it wasn't until 2020 that I finally decided to post it. I was afraid that my skills weren't "good enough" and that "I couldn't do it". Eventually, I started to realize that "not good enough" was still better than "nothing at all" and decided to post.
Suggestions about not stressing about numbers are also very good. Popularity depends on a lot of factors and objective quality is just one of these factors. Many popular artists either built an audience elsewhere throughout the years through social media or are already well known due to their previous works. Building an audience, especially if you're like me and you're basically starting from scratch, takes A LONG time, so don't feel bad if your work doesn't explode in popularity right away. Also, try not to look at other people's numbers and not to make comparisons, that only brings a lot of frustration.
Also this:
Speaking as someone who used to have a somewhat popular blog on Tumblr, I can definitely confirm this. And yep, "don't feed the troll" is definitely the best advice in these cases. Most trolls want to just cause a reaction and blow things out of proportion. But if there is no reaction... they'll have nothing to work with to blow things out of proportion XD