If theres 30 minons top and the enemy top laner shoving down our bot lane inhib tower. We can't "group" and hope for the best. I see this problem sooooo often in my games, because people think that if you just "Group" you'll win. You need to have waves pushed out or you won't be able to do shit, because you can't out rotate the enemy team because you have no waves.
TLDR: Shove waves before grouping.
No! Don't listen to OP!
Always group no matter what!
I'll be over here with my main. 
.
It irks me sooooo much when I see an incoming wave in one of the side lanes and I ping that I'm going there to shove it out, and then my team decides to get caught out or try to fight then gets mad at me for "splitpushing"
Like, do you want that giant minion wave to go to waste or possibly get splitpushed right into the tower?
Play Singed, push all waves. Ignore team. Win game.
Not much gets me more aggravated then when someone on my team is constantly itching for a fight against a splitpush comp and doesn't understand why I'm not going to stand there posturing with them for 3 minutes when the enemy has 
Every... Single..... GAME
"Just group." But they have Fiora in top lane, Yasuo in bot lane, and Ezreal, Janna, and Nunu mid. "Just group." We're never going to be able to engage against those 3 mid lane without losing objectives both bot and top. "Just group." Seriously no point in grouping; need to catch either Fiora or Yasuo and then force an objective while they're dead. "Just group." Fine, we'll do it your stupid way.
Nexus explosion "GG EZ noobs" -Yasuo 2016.
the first thing you gotta do after recall is go to free side lane immediately to clean the lane then go mid and group despite your role in the game
Most people completely ignore sidelanes completely ignoring the fact that 30 minions can take down turret. After turret they will take down inhibitor
Many people completely ignore Super Minions or even don't care if they lose inhibitor Drake and Baron > Nexus / inhibitor or is it?
HOLY SHIT GAIZ THEY ARE DOING BARON!!! SOMEONE GO CHECK IT OUT!!! someone goes at baron and dies to the enemy team. Fucking genius!
People completely ignore the basic rules of the game to win the game you need to destroy the enemy Nexus to destroy the enemy Nexus you need to take down at least 1 enemy inhibitor to take down enemy inhibitor you need to take down towers
To people in Bronze and silver, shove side lanes slightly past river and group for objectives. Generally this is the best way is to group unless you have TP. With TP, teleport to your team as a fight breaks out while splitting so you have maximum map pressure. Just make sure you tell your team to not fight until you push far enough.
The number of times my team goes out to team fight an pays no attention to the winions actually disturbs me.
Ugh this tilts me whenever i'm playing a tanky teamfighter like Amumu or Sej and our top lane split pusher like Jax/Fiora refuses to go top when the minions are on the inhib tower, and gets mad at me for not being there when they push up mid and get engaged on.
It's like "Duh, I told you to go handle the top wave, we can't group if the enemy can threaten our side wave inhibs."
In a perfect world, yes - push side waves before grouping, taking a teamfight, get baron, have nicely prepped side waves that you can baron up, take 3 inhib, then go get Elder and win the game.
But in a real game, sometimes you dont have that luxury.
I always get the teams that group when we shouldn't and split when we need to be grouped.
Like the good ol saying "i shoulda zigged when i zagged".
Makes me SMH every time.
don't group Keepo
or whatever
It's why zz'rots is such a strong item in solo queue. Enough of them, and grouping is always the right approach. :D
What is map pressure.
It is very irksome to watch a team try and analyze(i.e. start blaming things) itself after failing a fight because 90% of the time they're way off. However, sometimes you have to give up that juicy side wave because there's something important to group for. You don't need total map control to get things, but at the same time you shouldn't group for no reason, always have a clear and obtainable goal.
I hate being called to group as a split pushing top laner when the rest of the team plans on just standing blank-spacedly in front of the enemy turret with our group. Not even seiging or realistically trying to follow up on a pick or make one themselves, or take any objective at all. I'll just go back to lane and keep farming/ creating pressure/taking turrets, ty
Youll have an easier time teaching astrophysics to a cinderblock wall than this to a pub, sadly.
Just group and form an orderly single file line please. 
Just group and put your bathing suit on for a dip in the pool.
How bout a nice big group hug!!!??
"group mid group mid group mid" Pings teammates 20 times until somebody tells them to shut the fuck up "reported!"
Just a couple days ago I was in a game, and jungler was like "We need to group, they are grouping" They however... had a Sona, a Kenen and a Rumble. So I told them... "No, don't group. Push lanes separatedly, since me (Trist) and Olaf are quite strong"
We just won skirmishes in 1-3-1, 2-3 and 1-4 scenarios and that's how we won the game! Pay attention to your compositions! [slayer-jinx-wink]
I mean another thing people dont realize is that sometimes their team is just better at team fighting and grouping will make things worse
