People who complain about the Juggernaut reworks
Are probably the same people who make long wall-of-text posts about how diversity is so bad.
These reworks have been out for less than a month. They have already been tweaked. However, instead of buckling down and thinking outside the box when dealing with someone like Darius/Skarner/Garen, they simply ask for nerfs. Bronze-through-Plat, Skarner and Garen are at the top of the leader board. Get to diamond+? They get erased from existence and Darius is like 10th place.
Do you know what will happen if we gut Skarner/Garen/Darius into oblivion? We'll go back to the same rotation of picks. Adding four champions who are actually competitive picks will have been for NOTHING. Oh hey, while we're arguing about win-rates, Heimer's been top of the leaderboards for MONTHS as a solo queue pick. Except nobody asks for nerfs, reworks, etc. Because he's not a problem in low tier games.
These reworks are a tipping point. Either Riot's going to listen to the community again, nerf it and we'll go back to the same old picks top lane...or they'll stand their ground, buckle down and say "Learn to deal with these champions. We've tweaked them enough. The rest is on you". It's getting super tiring to see stuff like THIS:
https://www.youtube.com/watch?v=HAG6Wr5cKO8\
and have it be used as evidence for why Darius needs to be completely gutted.
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were all legitimately too strong following their reworks (Skar Skar especially was probably in one of the most OP states any champion had even been in), and 
is a bit too good right now (though probably just due to his Q healing bug), but I agree with you that a lot of the complaints just boil down to people having their expectations defied. Riot took a bunch of poorly-scaling lane bullies, plus Skarner, and turned them into powerhouses truly capable of carrying throughout the late game. Until now, melee champions only had a real choice of either dealing tons of damage while being super-squishy, or being really tanky while dealing very little damage, and now that juggernauts are a thing and represent the epitome of tanky DPS, a lot of players are still not realizing that they can't win against them by just passively attacking them in melee range. I predict that people will eventually adapt to juggernauts and kite them a lot more, which might also reduce their success, but overall the juggernaut update opened up a whole new set of possibilities for fighters and comps, and is a major positive change the haters will likely just have to get used to.
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) just run past my entire team, not giving two shits about an entire teams worth of damage and CC, bursting me as an adc down, and getting away with barely a bruise to show for it.
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) just because I have to ban champions who I cannot play against, that's a shitty choice to force people to make. I think that regardless of elo this is a problem and while it would ideally be solved by the balance team they have been making changes lately that make it worse and worse, so they either need to start balancing the game for the majority of players or they need to give us the tools to balance it ourselves (banning is a stronger cc than death).