This is really late for this post but... Not every Udyr player is like that, I personally play Udyr with the all-farm tactic when I have a team that I can rely on to not lose lane horribly.
There are a few different types of junglers: gank junglers, which rely on their earlygame to gank and get a lead for them and their laners, tank junglers, which gank much less often and have less reliable ganks than gank junglers in exchange for tankiness and lategame, mage junglers, which honestly I don't know much about, and farm junglers, which farm as much as possible throughout the game in order to get a gold advantage. This doesn't mean an Udyr should never gank, he should gank at least as much to help counter the enemy junglers ganks.
Udyr as a champion is horrible in teamfights compared to most other champions, and should never be picked if your team has weak teamfights and/or no engage. If you build tanky then you're basically just a stun-bot and if you build damage you're more than likely going to be a glass cannon with lifesteal in the middle of all the action is, AKA the area where all AoE abilities are likely to be thrown, skillshots need to pass through, etc. Not to mention that his only engage is to run face first towards the enemy team in bear stance while praying they don't have any CC to stop you.
His strengths are in his jungle control and split pushing. Lots of people see Trick and think, "He did pretty well in that game, and was flashy/cocky doing it. Sounds like I should learn to play like that!" And they try, and fail because they don't know things like that swapping between Tiger and Turtle is the most reliable way to take dragon (Level 4, 5 minutes and 45 seconds is my normal dragon goal) or that you NEED to stun people whenever possible in 90% of situations. Many will think Tiger = insane damage, Turtle = unkillable, Bear = perma-stun, and Phoenix = massive AoE, but don't realize that they are just auto-attack buffs and rely on rotation between them in order to be effective.
TLDR: He CAN have insane split-pushing and 1v1, but loses almost everything in a teamfight and is reliant on teammates doing well enough to let him stay and farm in his jungle. There's a reason why is difficulty is 7/10.