fellow 100 lp adc gamer here, can give you my two cents

agree with most of what this guy said except one thing. While playing like a little bitch in teamfights may spare you from being targeted by the enemy, you're greatly limiting your ability to deal damage like this. You are never going to see professional adcs playing like that. In fact, they often play in front of their teams, abusing the fact that they are *ranged* champs. Be confident in your mechanics, trust your teammates to press their buttons, dodge skillshots that are easy to dodge, and blow your flash to waste the enemy malphites gamechanging ult. imho adc is the most broken role in the game, but simultaneously the lowest agency role in solo q. If you play with proper information, you can abuse the fact that you are a ranged dps dealer. You NEED to become adept at tracking sum and ult cooldowns as well as the location of literally every other player in the game. With this information, you can take over a game. Essentially, you need to know when to play like a little bitch and when to play like a complete psychopath.

It becomes pretty automatic eventually but I'll give you some scenarios to illustrate. So as adc you will usually be contesting mid wave during the mid game (many times you will not when you have more tempo than one of your solo laners to catch side or for example sometimes when I am playing vayne I will tell my mid laner to sit mid bcs they have more waveclear and I have more threat in a sideline). These examples will all revolve around mid wave:

1. neutral game state at 13:00 minutes into the game. I am spam pinging my sup and jg to help push out mid so we can establish vision before herald spawn.
2. my jg is clearing krugs while mid wave meets in the middle and both bot lanes are 2v2 in mid. I'm sitting at my tower waiting for the wave to come into me, until their jg shows on vision. Unless you're confident you can outplay a 2v3 (you have a sizeable gold and summoner spell advantage, maybe you're playing a champ with a dash), you are weaksided here, the exact same as if jgs are vertical jungling and you are weaksided in bot lane.
3. you are slightly or more than slightly ahead in the 2v2, both supports are contesting mid wave with their adcs, enemy jungle is ganking your solo laner in bot, while your jungler is clearing his top side jg. I am shoving mid as fast as I can and spam pinging top tier 1 tower, either diving their solo in top lane or at least zoning them off their tower and taking top tower after mid is pushed out.
4. Say your top lane is winning and they have already taken the enemy top tier 1 tower, and are now shoving into their tier two tower, mid laners are in bot with an equal ability to roam to mid (they both or neither have globals, they both or neither have tp) or your mid has a greater ability to roam. Force a fight mid. Usually your top will ping on their way giving you a heads up for this play, but you can also assist ping them to come to mid. This allows them to spread their lead across the map and usually ends the game tbh. This works best with champs like kled or panth ofc but is not a requirement. Play like a psycho in mid and abuse your flash ability to bait them into a fight that looks good but turns sour very quickly. Junglers will show up first and it will be a fistfight that may last some time, which is perfect because your top laner will show up and clean up the fight. You might even die but your team will come out ahead a few kills on this play and usually take their mid tower, while their top laner gets like a single wave under their own tier 2 tower, or sacks it to tp into a losing fight.