Blaming them might be accurate, but it hands them the fix too. Keep the part you can move.

Knowing who caused something does not help you change it, and it can quietly put the repair in their hands. If the solution depends on someone else admitting fault or behaving differently, you have made your progress conditional on a person you do not control. Accuracy and usefulness are two different things here.

Without pretending the fault was yours, find the portion of the situation that responds to your actions and work on that. Ask what you would do if nobody else changed at all. Keeping hold of that part is not letting them off, it is keeping your own options.