You just have to search a bit on the internet and you will find plenty of testimony of sex abuse, the infamy of murders he was connected to, and many false and broken promises, brainless absurd errors of fact in what he has said on many subjects, plagiarism, slanderous lies about people. To help people with good hearts to find the truth, here are some links to follow. If you are a devotees, then you will almost certainly not have the inquisitive mind or the courage to follow more than one or two briefly!
Sai quoted on his Divinity, mystery, mission, inscrutable and miraculous nature etc.
The long history of widely reported and testified sexual abuses by Sathya Sai Baba
V.P.B. Nair. B.Premanand. R.Priddy: Sai Baba Bedroom Killings
Myths, deceptions and lies spread about himself by Sathya Sai Baba
The world media – articles critical and revealing of Sai Baba’s real nature
The BBC documentary ‘The Secret Swami’ is revealing indeed – see summary/video clips