In this case, buried among some semi-coherent arguments, we reach the point where one should ask "Was this product compelling compared to other solutions that tackle this pain point?"
Obviously not, but don't expect the company to smell the coffee. In their opinion, their "few competitor apps" didn't matter, but they lasted longer, so they probably did. Oh, but of course "they weren’t doing it as well."
Take a look at the comments rolling in here, some of which note that the product didn't seem like compelling standalone option but that would have done well as part of a larger solution. Others inquire why certain features were left out that would have adequately addressed the entire pain point, but left the product feeling incomplete otherwise.
Of course, these potential customers were all wrong, because "other apps felt heavy and complicated."
Founders considering mobile, don't make the same mistake(s) this company is making. Rather than write some clickbait Mediun post after the fact, remember that a great UIX, onboarding and maybe even a mascot might be necessary for mobile success, but they definitely aren't sufficient. Nothing beats product market fit, and if a mobile app is necessary for said fit, you better not only bother with mobile, you should embrace it...objectively.