I'm 15 years old, I built 3 SaaS that all failed

For the past 2 months I've been trying to be more active online, the classic build in public and I've learnt way more than I have in the past year but I still fail to understand why my products always fail. One of my products is a productivity webapp called "dailydice" in which you basically get 5 productive tasks to complete per day to avoid laziness, the second one is "studysprint" for students with upcoming exams and need to prep, and my most recent one "fitcheck" for this one you upload a photo of your outfit and the AI rates it and gives you advice on what to do better (I recently got feedback for FitCheck and no one was interested at all)

How do people who succeed in SaaS do it? Do yall have connections? Money? Programming skills? I need advice

Author: yesimfarida