Just say NO
It is clear to anyone who has worked the roster that the company no longer rosters safely. There are flights we simply can't operate safely due to fatigue. It is up to us to be professional and manage safety. The roster will change if enough of us refuse the duties that are too fatiguing. They can roster whatever they like - I wont fly when I can't complete the duty safely - without planning to use controlled rest or drugs.
In the last 6 months I have refused 8 duties due fatigue. I told CC that I am happy to work, but I can not safely complete the rostered duty. ASR-F filed. It is not hard to do. I haven't had any issues with push back.
Why risk your life, your career, your passengers, your health for the monkeys who are running this mess? Just say NO.