It's really difficult. It took me being banned to realize that I need to stop being a douche, and I have still been having troubles lately.
For instance, my first game today was vs a Brand as Heimerdinger. Not only is Brand a horrible champ to fight, I also got counterpicked. I got destroyed in lane mostly because of Sion's amazing ganks and Brand's 100-0 ability with my turrets, and I was pissed. The reason I was so pissed was not because I lost lane, but because our Diana outright REFUSED to gank. I asked her when I was at 0/0/0, 1 death, 2 deaths, etc. She didn't even acknowledge me. All she did was camp top and fail gank after gank while our Renekton fed his ass off. The whole time, I begged for her help and got none.
My second game was even worse. I made the mistake of playing Janna and not being able to predict the stability of Riot's servers/my connection. The whole game, I was plagued by lagspikes that hit REALLY hard and then vanished. Worse yet, our Vayne gave first blood (>Vayne >SoloQ >VAYNE >FREAKING VAYNE) and then said "bot's over". I got a kill lined up for her and she didn't even try to get it, so I became 1/0/0. Because laning phase ended so early, I wasn't able to get any assist from bot and was gold-starved as fuck. For the rest of the game, she farmed Skarner's jungle and tried as hard as she could to avoid teamfights. I'm not exaggerating, she sat in base/Skarner's camps for the ENTIRE GAME. It was essentially a 4v6, with her Eing Trist to safety and giving her gold. If I recall correctly, she only made a teamfight appearance one time, only to Condemn Tristana to safety. I kept dying because of their CC and mobility heavy team comp and poor positioning. The constant lagspikes every time I would try to get near anyone didn't help. She ended the game 2/1/4 and did a whopping 7.5k damage as an ADC. I lost my cool at her (Not swearing, just saying things like "You're not doing anything, please do something, we NEED you, etc) and so did the rest of my team. For bonus points, toplane insta-locked Teemo and said "Don't worry, it'll be fine."
No. Trading a kill for a death the entire game is not fine. Playing Teemo is not fine. It's always the Teemo and Vayne players, man.
TL;DR- If you see a Vayne or Teemo on your team, DODGE ASAP. The only reason I didn't was because I had already dodged twice and didn't want Lyte's statistics to ban me. Never play a PvP match in the early season, you will want to kill yourself.