It's kind of a mixed bag. Some aspects of Thor's character and story in Ragnarok are true to the comics, but there are also significant changes and creative liberties taken.
In many comic storylines, Hela is depicted as a powerful foe, but Thor often holds his own and can match or surpass her strength depending on the circumstances.
Hela is a major villain in the Marvel Comics universe. She's the daughter of Loki and has the ability to control the undead. Her powers are quite formidable and she poses a significant threat to the heroes.
The movie Thor: Ragnarok draws its roots from the Marvel Thor comics. It weaves together elements from different comic issues to bring the story to the big screen. The comic influence is evident in the characters, settings, and overall plot of the movie.
Well, the story of Thor Ragnarok begins with Thor being imprisoned. He discovers that his homeland Asgard is in danger because of Hela. Hela is this really strong and evil force. Thor has to fight his way out and ends up on Sakaar. There, he faces Hulk in the arena which is a wild battle. Meanwhile, Loki has been up to his usual tricks but also joins Thor in the end. Valkyrie, who had her own issues, also helps them. They return to Asgard and engage in a huge battle with Hela. It's a story full of twists, battles, and heroism.