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.
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.
The 'thor ragnarok graphic novel' is mainly centered around Thor's struggle during the Ragnarok. It shows how he teams up with the Hulk, Valkyrie and others. There are amazing illustrations of the epic battles, the destruction of Asgard, and Thor's attempts to save his people. It's a great way to experience the story if you are a fan of the movie or the Thor comics in general.