You should build on budget 1080p gaming like this:
BlueXGreen team :
OS: Windows 10 Home
Mainboard: Gigabyte B360M 64.99$
CPU: i5-9400F 149.99$ (You can get it cheaper if you can find one)
RAM: 16GB DDR4 2666mhz 60$
GPU: GTX 1660Ti 250$
POWER: 600W PSU 40$ (if you can find)
Red team :
OS...