A person or guy or anyone who is hurting your career and in turn hurting your family consistently since many years is a sign that you need to end that relationship (friendship,etc) with that selfish person soon who only cares for his/her benefits and even you need to end any relationship (brother, sister in law or others) that is toxic for your life and for your passion in career and happiness. This is one of the signs among many others. It is better to end soon rather than crying your whole life and holding on to that toxic relationship whether it is sibling bond, mom, dad, your spouse or kids or friends or any kind of relationship. Take care and all the best.
Finally it is our life and we have all the authority to decide for our career and happiness and no one else has authority over our life, passion, career and happiness.
End it before it get worse.