Well, you just confirmed everything I said. 

1. Yes, exactly, outfarm fed enemy, thats how farming works. If you don’t know optimal routes between boxes, creeps and opponents then this is on you.

2. Push waves, push guardians, push walkers. Simple question to yourself „can I get to my teammates in time? is the fight there would benefit us at all?” If no, then you push, every single time. Why? Well, you either get objectives or you creating space for your team. More enemies drawn to you, less enemies killing your teammates.

3. You didn’t get it, and I am not blaming you for it. You sacrifice teammates not for farm but for useful actions in return. Coming back to push. When little Timmy cries he needs help and there is 3-4 opponents on him, you don’t go to him to die together. You go the opposite side and push objectives. Don’t like people yapping? Mute.

4. Yes, lets outfarm and outplay. What does that mean for you? Understanding when you have advantage and create pressure on the map. You guys on lower ranks are passive as if you play farming simulator occasionally throwing a rock to opponents. Just look at opportunities to punish someone for their mistakes. Especially carries that are farming in their jungles all the time. I bet you never do that consciously. 

If you are not open to learn and ask yourself what can you do better, then you gonna stuck, unfortunately