What is to be done about disturbing negative thoughts, linked to ill-will, that disrupt life and concentration, and that cannot be controlled? And can completely ignoring them be harmful? And is it shirk to think that ignoring obsessive-compulsive disorder is harmful to a person?

The treatment for negative thoughts is to turn away from them and not pay them attention, replacing them with positive thoughts, while maintaining a good opinion of Allah and trusting in His management. One must focus on religious and worldly tasks and cast those thoughts aside. Ignoring obsessive whisperings (waswas) is the optimal way to treat them.