IF using Wordpress why custom coding? But I am also confusd about it.

I want to develop a website for Clash of Clans players. From where players can Copy the new and best COC Bases with links. I need to know about which plateform should be best. Custom coding or Wordpress.
Actually, there are different levels of the Townhalls and Builderhalls in the game and players can copy the design according to their level. So we have to create categorized. If player has Clash of Clans Level 9 Townhall then players can Copy COC TH9 Bases with links for their Townhall level 9 Base. If player has Level 10 of Townhall then players can Copy the Best TH10 Bases with links for their Townhall level 10 Base.
These are the main functionalities that should be focused. Clash of Clans is famous game of Supercell.
There are many levels like TH11 Base Layouts, TH16 Base layouts and many others.

I tried different approaches. I have created website using Wordpress and it is easy to manage. But from the last two months I tried to design website by custom coding. I used HTML, CSS, Bootstrap5 and Javascript for the Front end. I used PHP and Mysqli for backend. I used Chatgpt to write the code. But I faced many issues in coding because website is complex.