You may have
any opinion,
yet when you tell your own "truth" which differs even from Evgeni's version - it is a fabricated story. 
As I said, I think later Yagudin was jealous either.
Yet in the beginning of the story Mishin almost
didn't work with Evgeni - as Evgeni tells. Evgeni had to look what the older boys did and to try to do the same.
Then Evgeni started "to bite" Yagudin (who had the biggest part of Mishin's attention after Urmanov and Tataurov) - in order to make Mishin see Evgeni deserved his attention.
Then Mishin started to spend more time with Evgeni.
Only after that Yagudin had reasons to become jealous either.
At that moment of time Evgeni was not just a poor kid, but a rival who had been "biting" Yagudin day by day for a long time.
It seems Yagudin never spoke about Evgeni's attacks. Evgeni tells this story.
Yagudin didn't like this conflict - and Yagudin found the decision: he left the group. It seems everyone agrees, that it was good for all of them. Yagudin was almost a boy too, when he solved this problem. His mom was crying, when he had to go to America. Tarasova was impressed, that Mishin already knew, that Yagudin had decided to leave, though Yagudin still didn't know who was going to be his new coach. Tarasova knew, that skaters usually looked for a new coach secretly. Yagudin... didn't manage to make a secret out of that - he went to nowhere.
Lala likes to remind, that Evgeni was so strong when he was so young. Well, he became so strong when he was so young, thanks to Yagudin (to a high degree): Evgeni started to compete not on TV screens, he had been fighting for an opportunity to be Mishin's student day by day - when they both were kids