Other people's opinions end up influencing my own feelings
A collection of scribbles that could've been drawn in Microsoft Paint by some kid picking his nose, on the other hand, can reach four digits without a hitch.
Do I push my simply-posed ikemen characters onto my followers because it's crucial for me that they see how, in their forever-facing-45-degrees stance, they're undeniably better than their Paint counterparts? No, I don't. Instead, I keep drawing stuff on Paint while mining green gold in my nose, because I agree that those works can be definitely more fun.
What an unfortunate incident, isn't it? You're asking for advice from someone who's an endorser of the very same mentality that you hate so much.
But hear me out: in a sense, the idea that works that go unregarded are scrap is correct.
Moving on from self-satisfaction and drawing for others
However, a "masterpiece" is not only one that is loved and supported by a large number of people; there are also "masterpieces" that are valuable in the sense that some indie subculture nerds will name them as their personal favorites even though they are not highly regarded by the public.
Also, even in a timeline when Dragon Ball never got the public's attention, the manga would still be a work of great value to Akira Toriyama, because even if it didn't sell, he'd still be happy to have brought young Chichi into the world or something.
What constitutes a masterpiece depends on your set of values. If other people's evaluation comes before your own satisfaction, then it is natural and not a bad thing to feel that a work that is well received by others is a good work and a work that is not well received is trash.
Values change from day to day through experience.
When you were drawing for yourself, your own satisfaction came first, but after the experience of publishing your work online, you've come to place importance on the opinion of others.
I think your struggle comes from not being able to accept this change and trying to hold on to your old values, to a time when your works' worth was only for you to determine.
If you want to go back to your old beliefs, then stop posting your work online. If you show your work to others, it's only natural to feel a certain way about their comments and opinions.
Perhaps it's about the way you put it: you say that your feelings towards your own art are now based on other people's opinions, which doesn't sound so good.
Instead, let's put it this way: you've stopped caring about your yeets and you've learned to appreciate other people's oohs.
You have grown up as a creator, you have moved on from drawing for your own satisfaction. Now you want your art to put smiles on other people's faces, too.