LP Gain/Loss

Dear Riot and fellow summoners (if that's still what we're called), my user name is Pineapple Marrow and I have an issue that I'd like to address concerning the amount of lp I gain and lose. Whenever I duo queue with people I always gain less lp when we win, and lose more when we lose. I'm not just saying this based on one game or one person, it happens every duo game with everybody I play with. To give an example I just got out of a game where I went support Lux and queued with a mid Azir. I had the same number of kills as him, less deaths, more assists, more gold, and the highest kill participation in the game, but when we lost he lost 21 lp and I lost 22. As another example I lost another game earlier as Galio top queued with a Zed mid (The same guy). I had more gold, less deaths, and higher kill participation (not to mention the fact that I got first blood, and an s rank as Galio in ranked) than he did, but he lost less lp, I don't remember the exact numbers but I'm sure you could look it up. For an example of a win I played another ranked game with the same guy, he went Garen, I went Akali. I had less deaths and a higher kill participation, but he gained more lp. I've done ranked with several other people, and every time I asked how much lp they gained/loss, and it was a better number than mine. The only exception to the rule I just stated was when I played games with my friend tagerian, who I never asked, so I don't know the numbers and never did. Another issue I have is that several ties I've had people on my team afk, or intentionally feed, and still lost upwards of 20 lp for the game. I don't know how you guys feel about those types of games, but it doesn't seem like I should lose lp for them. I report intentional feeders and afks whenever I see them, but I've never seen anything happen as a result; I've never been refunded lp, I never gotten an email saying the user has been banned, the games still appear in my match history. Additionally I always seem to gain less lp than I lose, I get that that's how the system works, but given that I'm only silver 5 it seems like it should be a bit more even. I genuinely hope I get some kind of response about this, I'm not going to quit the game over this or anything, I love the game and am excited for the new season, but things like this make ranked considerably less enjoyable. I emailed this to [email protected] as well.