I don't know for sure but my guess is he just didn't make it in fashion. He won a modeling contest on some morning show in the UK (a measly £2,000 cash prize and a 2 year contract with some agency I never heard of
Exclusive: 'The Complete Package' winner talks Harry Judd and why he's ready to follow in David Gandy's footsteps), and then models.com shows he only had work for about 2 years, from 2014-2015, then nothing posted after that. And it's important to note that most (but male models esp.) do a lot of free or barely paid work in the beginning of their careers, and even prestigious magazine cover jobs are often unpaid because you get 'exposure' that presumably will lead to higher paid gigs. But there are tons of other models all vying for work, and even my successful male model friends have had varying degrees of success. So as much as modeling looks glamorous, it might not have paid any of his bills.
So by the time he showed up posing on FitYoungMen in Dec 2016 or wanking on English Lads in 2017, nude/porn work might have felt like a more easily paid version of using your looks in front of a camera. I don't know if he cammed before or after that since I can't find dates on those cam shows he used to do.