Sales success is about sales. Able to sell multiple copies if you're selling something. Able to get promoted if you're talking about career. I think this is what we see as tangible results based on common markers of success. Even a counter telling you how many visitors came to your blog is about sales success.
Social success is about being successful among your peers or people that you respect. If your co-workers think you are successful, you're likely a social success as well. The industry that you're working in gives you compliments and look up to you for advice.
Self success is about being successful in your own mind. It's not tangible and only you will know it. Self success means you had achieved what you set out to do and is genuinely proud of your accomplishment. Even if nobody knows it, you know it and you're happy. Some people think success must have self success to feel meaningful to yourself.
The trick is that you can only take 2 corners because while not being mutually exclusive, they kind of hinder each other. Let's apply it to my work as a private tutor.
Sale success - 8/10
I have a waiting list of students if they want to join my lessons. Every year there'll be recommendations by ex students or parents for the past 12 yrs so I think I did my marketing and soft sales pretty okay. There's only 2 years where there haven't been as many students as I would have liked, but on average I think I am pretty okay in this department.
Social success - 1/10
I don't have industrial recognition, nor colleagues praising me. It's just the nature of my job that isolates me from my peers. Technically, we're all competitors, though I feel that the pie is large enough to spread to everyone who is serious about their work. I'm unlikely to receive any recognition from the industry too, haha
Self success - 10/10
I'm very happy with the achievement and the progress that I have. The autonomy and the independence I have in this career is fantastic, and I tap dance myself to work everyday (okay, almost everyday). I can see a project from birth to end and take part in all the steps, so there's a lot of meaning and significance in the work I do also.
Try thinking of anything in this framework. It might open up your eyes to why you are not getting the kind of happiness from it OR why you are so happy with the kind of thing you're doing.