Lazy atheist agenda? Check these quick facts about Mother Teresa out then:
She ran hospitals (If an institution with a 40% mortality rate is actually classifiable as a hospital) like prisons, particularly cruel and unhygienic prisons at that. Children in her care were tied to their beds to prevent them misbehaving. She let the terminally ill (and even those with illnesses that would have been curable if her 'hospitals' were run better) die without pain relief because suffering bought them closer to Jesus
Most of the money donated to her causes was filtered back into the (already exceedingly rich) Catholic Church, or used to expand her 'charities' to new regions, rather than actually helping those in her care, many of whom were starving and lacking basic medical care... Basically she didn't love the poor and hungry, she loved poverty and hunger, she saw suffering as a grace and despite being lauded as a humanitarian given the fame and donations she had at her disposal did relatively little practical good.
She befriended and defended a genocidal dictator, Jean-Claude 'Baby Doc' Duvalier, and accepted donations from him of money extorted from the very poor she was supposedly helping as well as drug dealing and body part trafficking.
She accepted and refused to return profits of criminal activity. Including one and a quarter million US dollars in cash and use of a private jet from convicted racketeer and fraudster Charles Keating who stole over $3 Billion from US taxpayers in the 80's and 90's... Upon his conviction not only did Mother Teresa and The Catholic Church refuse to return the money they had received from him, Mother Teresa actually tried to use her influence to have him let off or at least sentenced leniently.
She publicly defended known pedophiles from within the clergy, including trying to use her influence to have leniency shown in sentencing of convicted child rapist Donald McGuire and campaigning to have him reinstated to the priesthood and allowing him to continue his work... even though this work would inevitably bring him into regular contact with children.
Because so much of the money she raised went to the church not the poor she hated waste in her hospitals, insisting staff reused needles until they were too blunt to continue using... even in known HIV high risk areas.
She directed a mere 7% of the money her charities raised directly those she was supposedly helping... With much of the rest ending up in secret bank accounts and as yet still unaccounted for.
She routinely baptised those dying under her care regardless of their own wishes or religious beliefs.
She opposed both abortion and contraception, even in cases of incest, abuse and rape.
She praised and supported Ireland's anti-divorce laws... even in cases where spousal abuse was apparent, forcing countless women to live out lives of slavery and torture.
Basically pretty much everything about her was evil, but the churches PR machine didn't have a hard job spinning a kindly looking old women stood amongst some of the poorest people in the world to look like a saint, and once that side of the story was cemented in the press it became all most people saw of her.