it's funny because garen has been about this strong for a LONG time.
if people stopped being retarded and ran armor pen runes/masteries with a ghostblade pre-patch, they'd see just how strong he is in teamfights. he will jump on any carry in a teamfight and 100% to 0 them and possibly one other squishy caught in your spin, every time, NP. he's been like this for so long and we still have morons claiming he's inferior to darius when his spin does twice as much damage as darius ult does, to multiple people. on top of being a more versatile character in general with far more favorable lane matchups with a harder to hard-counterpick top lane.