All that therapist did was set your recovery way back. Sure, he doesn't mind hurting you, it's your pain, not his! How infuriating is what he has done to you. You should never let anyone touch your leg. It's nobody else's knee but yours! Your ROM comes by getting your swelling down. Pain is caused by trauma, which increases swelling, which decreases ROM.
You need to fire that PT. When and if you go back to PT, you take complete control of what is done to your knee. You are the employer, the boss. PT is your employee and what you say goes. I suggest you take the next month off of PT and heal. Your swelling will decrease and ROM will increase.
Very many of us never took PT or exercised. I am one of them. We just did our daily living using our knees in doing the things we needed to do. Your knee will rehab itself if you just use it as God intended you to. You don't need to exercise or take PT! Your body knows what to do!