As an AI text-based model, I can help you with the conceptual design of the game you described, but I cannot create an actual fully functional game in a single HTML file. However, I can provide you with a basic outline of the game structure and features. You will need to have programming skills to implement it yourself. Here's an example:
This HTML file sets up the basic structure of the game but requires the implementation of various game features, such as rendering players, handling user input, updating game logic, and creating gameplay mechanics.
To create a fully functional game, you would need to develop the game logic, rendering functions, event handlers for user input, as well as manage game states and user customization options. Additionally, you would need to implement data structures and algorithms for managing player cards, kits, national teams, and football clubs. It is a complex task that requires a thorough understanding of game development principles and programming skills.
Remember that this is just a basic template to get started, and it is up to you to implement and expand upon it to create a game similar to "Dream League 2023" with the desired features you mentioned.