league-of-legends
So before the unfortunate day happened (internet fall down, got afk one whole ranked game) I was getting 15-26 LP for each win/lose. But after that day, I'm winning/losing only between 3-7 lp.
I'm Bronze I with around always 50-60LP, I had a winning streak and a losing streak.
Actually, also my question is: shouldn't a winning streak raise my lp winnings?
It depends, I like to choose a support based on the ADC early game play, if the ADC is squishy, let's say for example Ezreal, I'm more likely to pick Soraka or Sona to sustain him on lane. But, if you have a more sustainable ADC, you can pick a more aggressive support like Leona, Nunu or Zyra.
Another thing to observe is the synergy of Support/ADC level, Leona has her Q,W and E ready by level 3, which can combo really good with Graves, where in this level he's really great. We could also mention some good combos like Ashe and Janna, due to the synergy of Janna's Shield and Ashe's crit, and Ashe's slow with Janna's slow.
Besides, picking a champion that you enjoy playing, which will also help in your performance, you could ask the ADC which support he enjoys to play with, if he has any preference and you feel his preference is useful, you could pick it too.
I found the League Support Suggester, a recommendation software to provide the best support for your current needs.
I've also found the following chart which really helps me when to choose a good support for my ADC, I usually pick one of the three recommended:
Your in-game score is irrelevant for LP gain/loss. It is calculated based on the game's estimation of the relative skill differences between your team and their team, as calculated by win/loss history; and by the difference between your current LP and the game's estimation of your skill level. This second category helps dampen the effects of streakiness, and ensures that there's a penalty for a loss even in D5 of a league.
As a side note, if you have that many kills as Shen, and your team keeps dying, it's possible that you need to work on your teamwork a bit more, saving people with a well-timed taunt/shield.
Best Answer
No, you shouldn't just get more LP after a winstreak.
Say you have a certain MMR (Matchmaking Rating). After the winstreak, you play versus better opponents. But your MMR is lower than theirs. Therefore, you have to 'proof' your skill to the system and continue to win. After a winstreak, your MMR can be a little higher. You'll play against slightly better opponents, but not the ones you've ended your winstreak with. This will make sure your LP winnings (and thus your ranking) is according to your MMR.
You may not have won more LP, but you've definately gained some MMR. This means that if you end up against the exact same opponents you've started your winstreak with, you'll gain more LP after winning from them, because your MMR would say you are better than them and thus deserve to gain more LP.
You've also stated you are Bronze I. That is an exceptional class (all I's), where you have to prove you are really ready to move up a division (which is, in terms of regular play, 'permanent'). You cannot downgrade to Bronze (unless you don't play for a long time) so you have to prove you are up for silver (and thus raise your MMR accordingly).
TL:DR: The harder your enemies get, if you defeat them, the less LP you get but the more your MMR rises. The harder your enemies get, if you lose against them, the less LP you lose and the less your MMR goes down.
The easier your enemies get, if you defeat them, the more LP you get and the less MMR you rise (so you will be even 'better' then your enemies). The easier your enemies get, if you lose against them, the more LP you lose and the more your MMR goes down.
The point where the definition of your enemy goes from 'he is easier' to 'he is harder' is your current MMR.