I’m confused about The Frontman’s back story

So I thought I understood The Frontman/Player 001/In-ho’s back story, but then I watched a video on YouTube talking about it, and now I’m confused.

In-ho competed in and won the 2015 Squid Games. We found out through Jung-ho’s mother that the reason In-ho competed was to get money for a liver transplant for his pregnant wife after she came down with cancer and he lost his job for “taking a bribe” from a criminal. But when In-ho came back from the games with the money, it was too late - his wife had lost her battle with cancer, and their unborn baby died with her. This destroyed In-ho, making him mostly cold and ruthless, allowing him to become The Frontman.

But…all of this would’ve happened in 2015, and the events of the show happened in 2020, 5 years later. When Jun-ho goes looking for In-ho, who’s gone missing, the landlord who lets Jun-ho into In-ho’s apartment says he paid the rent on time, but we see that the gold fish in his fish bowl are dead. Goldfish can survive 8-14 days without food. Which means at the time Jun-ho goes investigating, In-ho had disappeared more than a week but less than a month before Jun-ho arrived.

And when the VIPs arrive, The Frontman (In-ho) introduces himself to them, why means despite the games going on for years, the VIPs and the Frontman have never met before. So In-ho just started in this role.

So…did In-ho not become The Frontman right after winning in 2015? If that’s the case, what the heck was he doing for the 5 years between winning his games and becoming The Frontman? And what made him decide to take the role? Why did he wait 5 years? What changed?

If that’s not the case, then why is there an issue with the timeline? Is this a plot hole?

Am I missing something?