It sure is easy to get sucked into a pool of bad just a little at a time.
Last negative example: my wife's aunt had an illegitimate child in her 20s and spoiled him rotten into his mid-40s. She bled her parents dry, then after they passed, she quickly spent down everything in the estate for "...poor Steve." Poor Steve couldn't keep a job because of his laziness, alcohol abuse, drug abuse, and life-long rumors that he was too interested in babies' genitals. At early 70s, the aunt was living in senior citizen housing, hiding her chronically unemployed (but healthy, smart, and able-bodied) son in one of the rooms when home nurses came by.
My wife is a Christian, and family-oriented, and hated seeing her aunt in these circumstances. She quietly began sending money from her salary; it came out when a bank teller double-charged her (took her cash AND charged our bank account) for a money order. She told me what she had been doing and why; I pointed out she was just directly funding an alcoholic, drug-using possible pedo. About that same time her emboldened auntie asked for substantial cash to fix 'poor Steve's' broken car (he had no job). We had a hard discussion, then shut her off. She died a year or so later.
Poor Steve recently died alone in his own low-income home, surrounded by cheap liquor and home-grown weed.
Some people you cannot help, and once you know that, you aren't helping - you're enabling. Had poor Steve had some tough love in his teens/20s, he might have had a useful life. As would have the auntie.