You can adjust the combat AI level of your soldiers.

All you need to do is install this addon, then open the game. There you will find an icon that you can click on. You will then be able to choose an option that you want to enable or disable. If you disable it, then the AI level of your soldiers will be set to the same as that of the game.

This is a modification that allows you to set the combat AI level of your soldiers.

It's not a very difficult task to install, you just need to download it, and then you can start using it.