You can also activate the console and win the mission with console command.
I am sharing autoexec.cfg file with you via PM as I cannot upload it here. But you can also create the file yourself it has only this line:
disable_console_access = false
You need to put this file into your root directory of Phoenix Point ( D: Program Files\Epic Games\Phoenix Point\ for Epic in my case and d:\Program Files (x86)\Steam\steamapps\common\Phoenix Point\ on Steam.
Then in-game if you press ; you will activate console. (Same as Counter Strike).
If you type win into the console it will win your current mission.