As a fellow non-humble artist, I just had to click on that title and since you're open about your ego, I trust you won't be offended if I chime in from a different perspective, from one arrogant mofo to another:
People always say it's not good to compare yourself to others, that it's only going to make you upset. But I've always loved comparing myself to others. I figured this is because I have a big ego, so naturally when I compare myself to others and feel like I'm doing well in comparison, that makes me happy. Whereas people with a lower opinion of their skills are going to think they suck by comparison, which naturally makes them sad.
But then you come along, very confident in your abilities, having compared yourself to others yet you're upset, even though you feel your art is better that those other people's. And so I don't think it's comparison that's the problem. Rather, I think it's this:
Even a humble artist's comparison woes stem from this, I feel. They put in a lot of effort, so they 'deserve' to have a good product at the end of it[1], and that's why they're sad when they feel like the end product doesn't measure up to their expectations. When they see another artist put out (what they consider to be) a better piece for less effort, there's a hint of resentment there, much like how you felt seeing other comics get more subscribers for lower quality art.
However the humble artist is easy to sympathize with, because they're putting the blame not on other people, but on their own 'inadequate' skills. Their complaints about 'not getting what they deserve' is not an implicit attack on others.
I feel like that's the main reason people consider the arrogant to be jerks; if you're arrogant AND value the notion of 'deserving', then naturally you'll think you deserve a lot, and then resent people when they don't give you what you feel you deserve. This kind of being-upset-about-not-getting-what-you-deserve is inherently more accusatory than the run-of-the-mill variety, and is unique to arrogant people.
However, just because you think you're hot shit doesn't mean you have to believe you 'deserve' stuff! When I choose to do something, I never expect to be rewarded for it (unless someone explicitly promised me a reward, like a boss hiring me). I'm doing it with full acknowledgement of the risk that it might turn out crap, or that people might not care. Therefore I choose to do things only if I feel like it's worth doing anyway, regardless of the external outcomes. (e.g. if I'm bored, doing anything is an improvement over the alternative of doing nothing, and thus worth it for its own sake.)
I feel like this is the root of entitlement; doing things while expecting an outcome that will not necessarily happen. Being nice to others while expecting they'll like you. Raising a child while expecting they'll take care of you in turn when you get old. Drawing a dope comic with the expectation that lots of people will sub. Heck, just drawing, with the expectation that you'll end up with something dope.
Naturally when you have this expectation, you forget to consider the scenario where the expectation doesn't happen, and in particular if that scenario would still be a favorable one. So you choose to do things that you wouldn't have done if you knew your expectation wouldn't come true. And then when it doesn't come true, you feel like you wasted your time. Of course you'd be upset!
Me, I don't have that expectation. So when I look at my own work, and look at someone else's more popular work, I don't feel like I've been cheated out of popularity. All I feel is 'damn, my work is good; I'm glad such a good work exists in the world for people to access, and I'm the one who made it. And because it's so damn good, I can't help but feel like it will be discovered. Not gonna be upset if that doesn't happen within a fixed timeframe (e.g. my lifetime), but for as long as it exists in the world, it'll always be a possibility' And that's how I because that mythical individual who actually enjoys comparing themself to others XD
[1] And then the 'more skilled' artists feel the need to justify their skill by saying that they practiced for years to get to where they are; i.e. that they actually did 'earn' their 'right' to put out such masterpieces - they did put in the effort so they 'deserve' it.
(And I HAAATE playing this game (I honestly don't care if people feel like I 'deserve' my skills or not) - but on the other hand if I'm honest and say 'actually I honestly didn't practice that much or push myself very hard to get to where I am today', people might feel like I'm rubbing my talent in their faces and taunting them or smth. This is why compliments are awkward AF -.-)
(So I guess it's easy for me to say 'the concept of 'deserving' is a load of bull' when I'm the one getting more than I 'deserve')