how does come tom riddle became a villain

Have you read the book?
It all explained there...

In the movies, a lot of events were cut off. And some of these events is the red line between Harry Potter 1 until 7. As for the Half Blood Prince movie, I found it brilliant, but again some important events were cut off from the book.

Tom Riddle has always been evil, he had no parents to love him and no family. His father was a spoilt brat, and his mother was a witch... she used her magic to make a love potion... one day she gave that potion to Tom Riddles dad: Tom Riddle Sr.

Voldys mum thought that Tom had fallen in love with her and couldn't bare to keep feeding him love potions. With the effects of the potion disappearing, Tom Riddle Sr quickly disappeared back to his rich parents... leaving Merope (Voldys mum) heavily pregnant with the Dark Lord. Tom's mistake was to leave her like that, he will later pay for it... when Voldemort personally kills his grandparents and dad at the age of just 17.

Voldemort was just like his father, selfish and power hungry... the magical powers of Sylitherins legendary blood flowing through his veins, shaped Voldemorts personality and feelings. Once Voldy realized he could use magic, his hunger for power led him to perform many evil experiments at a very young age, nearly killing some of the kids at his orphanage. Voldemort had already considered muggles as nothing more than weak and pathetic, after learning of his father and what he had done... he changed his muggle name.

He was born as a result of magic and no real love between his parents. That's why Voldemort cared for nobody, he couldn't feel love, not even for his many Death Eaters, including Bellatrix who he saw as servants. They either loved him or worked for him in fear.

The only people Voldemort had any respect for, was Dumbledore and Sylitherin... he had thought his father was a powerful man, and spent years checking the trophy rooms and books of famous people. But once he realized his father was not "special" Voldy looked for the name Marvolo in the history books... then eventually he found the link to one of the creators of the school.

Things could have been different, if his mother didn't die...

well, they rather set up that Tom had problems before he came, that he did some cruel things before he came, that he knows how to "act" a role, but that was just to cover up that he was already planning evil

Well i think u need to read the books first so that u can get the idea about how he got sonverted to the biggest villian

well i loved to watched the movie of harry potter and waiting for the 5h part of this movie,, i never read the book yet

Yes, the portrayal is original and that's one of the reasons why Tom Riddle A.K.A Voldemort has a huge fan base. Usually not all villians are well liked like he is.