There's nothing wrong with looking at other creators and comparing yourself to them, I think, so long as you're able to separate your journey from theirs. I used to have crippling anxiety about it to the point that I would talk down about other peoples' stuff just to feel better about myself. Do not do this. If you have to rely on being negative to feel positive then life's going to get harder as your creative journey goes on.
I think my biggest achievement in this is learning to transform jealousy into admiration. Just remember that another person's work is not a reflection on your own, and even the people who are further along in their artistic journey almost certainly felt the same way you feel now about someone else. Being able to look at someone else's art, go "yeah, that's great!" and use it as either a source of inspiration or motivation makes life easier.
Of course getting to that point is really hard. I think a lot of it is like...when you're growing up and you identify yourself as an artist or whatever, that title becomes such a big part of who you are that it feels like a failure to your core self when you don't think you're as good as you would like to be yet. It's understandable! You're an artist, what you create is important to you! But realizing that it's about what you're creating and not about what others are creating is a good first step. You're walking your own path. Don't mind the people in front of you too much, you're all headed in similar directions. Don't think "I'm not there," think "I'm not there yet."
Also re: numbers and metrics, really really really do not worry about that. I remember being on deviantART and there was a huge thing about people pining for pageviews and it's really unhealthy trying to measure your success or your talent by numbers. Being noticed and getting those numbers has less to do with your actual ability and more to do with engaging your audience, marketing, and sometimes even just dumb luck. It should definitely not be used as some sort of quantification of your worthiness.
Just keep working hard, practice at a level of discomfort, strive to learn new things. It's hard being an artist! It takes a lot to even put things out there for people to see, so allow yourself some personal kudos 