Were you dissapointed? (Major Spoilers)

First of all I'm not a Math whizz or braniac and Math is one of my worst subject and I hardly ever passed at it at all. So when I watch movies like this about puzzles and solving problems I will be like 'wow' at the end because of the answer. So the movie was very intriguing as I watched it and I was like wondering who was the mastermind behind all of this. And of course I don't like to think much and hope to be surprised so I didn't work out who was the one behind all of this. And in the end they reveal that Hilbert was the mastermind. And I was totally disappointed about that because I thought someone else than in the room did that to them and it was not as simple as sabotage. Furthermore, I think the reason Hilbert did all of this was kind of ridiculous. Really? He would really went through all this trouble to kill Galois? I know that it is just a movie and overall it's pretty exciting and suspenseful so I give it a 6.5. But I'm not as surprised about the ending in this movie as in 'Exam'. I totally had no idea what the question and answer is on 'Exam'. I recommend you guys go watch it. It's pretty similar too.