For people who, like me, believe in Determinism(the Believe that is no True Free will), how do you draw the line for free will.

So I dont believe in free will ,through a combination of experience and events in my life(most to do with leaving religion) however like most, I recognise the need for the concept of free will, as artificial as it may be

But where to draw the line. Obviously, even for people that believe in free will, where they draw there line is different among each other e.g across cultures, generation and among individual, but what do you do when you know that line is just artificial.

For example, alots people say that trauma doesn't excuses abuse, only contextualise, it but if you have statical evidence that a large or even most of abusers have been abused/been through a traumatic event that is by defined an excuse.