Once the two of you have broken up you need to let them go and move on. If you don’t have a child with them you no longer need to communicate with them.
“We’re just good friends.” Yeah okay… All of your relationships should further you in life. How does continuing communication with an ex help you? Especially if the relationship was toxic.
Let me tell you it doesn’t! Delete the messages, delete the photos, get rid of the gifts, unfollow/unfriend, and block their number. You don’t need constant reminders of your past. You should be focused on your future.
“All of that seems a bit extreme.” Yes to someone who doesn’t plan on moving on. You can’t move on when you’re constantly giving the situation energy. Cut it all off and move forward.