Can't believe Garen is in this state..
As a Garen main, I honestly feel like Garen should get some sort of REAL rework, on the scopes of the newer class updates (assassins, mages etc.). His kit is outdated and dull, and his play style is too telegraphed and linear. Juggernaut update was too small (touched only 4 champions while recent assassin one touched like 8, and on a much larger scope) and felt kinda lazy.. Darius was the only one who benefited from it, mord got tossed around the lanes until they just gave up on him, and they decided that skarner is actually a tank.. LMAO.. Mean while all other juggernauts were just left out in the cold..
Meanwhile, Garen's kit has barely no synergies, and being kept boring, easy to counter and weak for reasons that aren't exactly clear to me..
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P - is negligible at ALL stages of the game (range creep all over the place).Doesn't synergises AT ALL with the rest of his kit.
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Q - offers very minor stats and coutered super easily (almost every champion has a slow these days, or even better CC).
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W - got gutted, turned into hidden stats that are barely felt ("Oh no (~Cried the ADCs of the rift ) Garen's shoulers turned silver and he yelled "DEMACIA", better to just... continue delete him in 3 or 4 shots anyway
" ) -
E - overloaded with gimicks.. so much power is being kept away from it for the sake to let it crit, the isolated damage and the reduced CD mechanic, that honestly as a juggernaut garen player, I NEVER utilise (at least out side of lane). The upcoming armor shredding is a nice buff but it just worsens the problem..
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R - LMAO why is this still magic damage? Why does
get to have the %max hp true damage but much more gracefully implanted, and with scalings? Why is the true damage only there so garen can be even more of a
wannabe? -
Stats - Just came back from the wiki cause writing these lines really worked me up,
has much better scaling in every aspect that matters to both (armor, MR, hp, hp scl, ad) EVEN TAKING GAREN'S W INTO ACCOUNT.
Ummm, rito plz?
Here's what I'm suggesting: If Darius is the "Build tanky, while have Innate High-damage" juggernaut (yeah they all do I get it but darius is the most tank builder of the bunch), Garen should be the "Build damage,Have high innate tankiness" juggernaut. A. It would play really well with their thematics, being opposites and rivals. B. Would differentiate garen amongst juggernauts for having abnormal build paths. C. Could validate crit garen as a/the meta build. D. Might not need too much changes to his kit and play style.
What I was thinking was give him (and bear with me on this) INFINITE stacking on his W (or at the very least, a much higher cap), and maybe a new passive of some sort.. This way Garen can become a late game monstrosity, building pure damage while still being tanky..
Just some thoughts.. Sorry for any bad english!
DEMACIA! 
and maybe one pure damage item (and one or two item slots reserved for traditional tank items) instead of just cleaver full tank. Building healthy and letting his W beef him up a little with the needed resistances can turn him into that traditional stat check juggernaut.