
you sure do make some stuff up at times.
Going to quote a website which I'm sure you're familiar with: TFA,
Rest defence tactics usually involve a couple of players that will stay behind the attacking line and snuff out all and any attempts at counterattacking and transitional play. Usually, we will see midfielders positioned deeper and just ahead of the defensive line
Being better at defending when attacking falls into being better at defending full stop, it comes into structure and positional play.
It's not rocket science, nor does it need to be overcomplicated.