They said on the ticket that it would become available again outside of that Blizzcon in 2019 on the news page. The bundled price of that skin was around 7 dollars when you factor in the other items, and 10 bucks if you bought it on the Blizzcon floor.
It’s not a 50 dollar skin and never was one, so it was never impossible for it to come out in 2019 as part of some event or even for normal tokens.
You have only yourself to blame for not reading the page and got exclusive access to it for nearly a year. Get over it.