Huh, I never posted on this thread? Odd.
The most demotivating thing for me was actually two things, one for comic I had: hate and nothingness.
When I first started out before RotH, there was this user who came around two months after me starting out. He would comment on every episode saying how ugly my art was, how ugly the hairstyles of my oc's were.
He lowered the rating of my webtoon and said it made his eyes bleed. And lastly, when I tried a new thing he ordered me to never do it again.
When I asked feedback, he would respond with "not my problem". It was someone who just stuck around to deliver me hate.
After I stopped SR and started RotH, he commented one last time on my q&a saying he was relieved that I stopped Sorcerer's Rise because it "made his eyes bleed for two months". Never heard of him ever again.
Then... nothing. I barely got any traction if zero at all on webtoon. I was lucky to receive any likes and happy to receive even one comment. I was depressed over it a while. The silence was just incredibly painful.
(This was before I joined Tapas and this forum).
I am still considering to just drop webtoon because most subs don't even interact with my series anyways.