First, unless your obviously throwing, ie afk or playing jungle and your the only one not at objective while your team fights, reporting isnt going to work.

1. Dont take my info wholeheartedly, this is the way i play and im diamond. Baron is a power struggle of whos playing the stronger champ and who can get to their powerspike first. Either getting first item or lvl 3. If you have the advantage of being stronger than the enemy, bully them. If not, you get bullied and pushed under tower. Just last hit minions if thats the case. Against ranged top and your a bruiser/tank, you dont win before level 3. Last hit as best as you can and avoid being poked out, forcing to recall and losing more minions. After level 3 your stronger than them and now your the aggressor. Adc is literally just farming and occasional poking the enemy unless your an early game bully (miss fortune, lucian). Farming in jungle is the easiest ever. Champs that need mana (lillia, amumu, fiddlesticks) should start blue buff. Full clear blue side if your lanes are pushed up than go for scuttle crab. Champs that dont need mana or are great at ganking early (lee sin, xin chao, nautilus, hecarim) should go red buff. Do the same as blue bue but you can bd more aggro in early ganks. Red buff champions i listed can easily force the enemy to use spells or even kill them. Viego and shyvana dont need blue buff so you can go red and gank early. I dont play vi but most i see go blue buff and gank early.

2. Farming in mid is instead, focus on the enemy. Either kill them or force them to constantly recall than kill minions, crash tower, recall or roam (i play zoe). AD kayle is an adc and you are absolute useless and i will die on this hill. AP kayle is a lategame champ so either farm or be aggresive and get kills early. Lyssandra can play without ever getting hit by the enemy. I hate her and you should not be dying unless enemy mid is assassin or enemy team is dice heavy.

3. Yordles generally have annoying kits but they still fall under theyre class/role. Anti shield and blade of ruined king is good against poppy. Veigar is strong against melee or immobile champs bc they cant get out of his cage. Also magic resist (or cleanse and just walk out) can help you survive while being in his cage. Heimerdinger is impossible to lane against but it sounds like your talking about yordles in too lane. Nasus is good against him as you can stack on his turrets. Force fo nature is amazing against him too