Yesei is indeed very difficult since you don't have the best cards possible. It is mostly luck to beat Yesei, but here a few things to keep in mind:
Good luck (literally). The music in the credits is very cool!
beat yusei story
Beat kalin kessler's story after you beat yusei's story
beat story mode 2 times then beat the gold cup
It depends what game you want him as a tag partner on. If it's yugioh 5ds 2010 version then beat team shooting birds 3 times. Team shooting birds is Yusei and Crow. They can be found in the south part of the Satellite.
yugi can beat yusei anytime. yugi moto is the strongest.
The best card in yugioh is the judegement dragon card.
beat the golden cup, the code on the real card and youwilet it,it cost 10,000 BP,so does stardust dragon and red dragon archfiend,but is worth it!!!
The Breakers beat the Cairns Taipans to win the Australian NBL competition.
In Real Life, I'd say Yusei would be better as he has many powerful Synchro Monsters and Jaden would have a hard time drawing the best cards out of his deck watered down with Equip Spells only usable on specific Elemental Heroes, but in the Anime, I would say Jaden as he has Heart of the Cards which allows him to get any cards he needs... I have no idea if Yusei has Heart of the Cards or not though. No He doesnt but he does have the power of the crimson dragon since he beat goodwin and saved the world...i would say it would be yusei who would win since he can call on stardust and mirricle dragon you will find this out in like episode 64...it would be close but yusei would win wong yusei cna call the dragon to fus ewith star duest if the 4 signer are not with him in that world and 2 it jaden school yusei cards jaden wood win yusei wood have to go back in time to vs jaden and jaden wood win kaiba wood beat yusei there no way he can beat jaden yusei is dum he the some thign 10 times in duel
beat* And you have to find leo so he can hide you
none of them you just beat yusei story mode and you get three of them yusei likes a lot of things he espessially likes milk and gold coin
beat yusei multiple times until he gives you it