Well, that topic just shows up everywhere. Most of the players (I don't know how many but I would say an eeeeasy 60%) are feeling their teammates are bad. From my point of view, you can't expect much from them, as you have almost no way to communicate with them. Obviously they'll never play as you think they should, they don't even kno what you think or do most of the time.
But as I said in other topics, luck balances out with the amount of games. So even if your teammates are bad, your opponents are not better. You can't just say "I played 1000 games, and in 900 of them, the other team had better players". Even if you play several times with the same players, the teams are miwed everytime, so having a losing streak should be as much your fault than your mates' fault.
I'm pretty sure the other problem is that ratio is way too overrated. For instance you see a lot of players saying "I killed three, my teammates didn't do anything!". But well, most of the time, it means "actually, I killed 2 and exchanged, and I was able to do that because the ones I killed were killing my mates". Between someone playing 10-3 with a very defensive style and someone with the same 10-3 with the always-agressive-or-flanking plan, the game isn't the same at all.
My advice is: never consider what you did was good if you die. Obviously it's too much and quite wrong, but if you follow this for a while, this might change your playstyle in a way that makes you win more (and at least it's interesting to try). Because by not dying, you stop relying on others. When you're with your squad, you can tell "take the tower", but not in solo, so don't expect them to know they can. In S+ it's pretty much OK I feel, guys always are looking at the squids up there, but it will never be as you like. You'll still feel like they're bad, even though they were able to carry S teams to go S+.
So well, by not dying you can play the objective, or kill, or do whatever you want. When you die you're forced to rely on your teammates for a while, the same ones you're saying are bad. And that seems like a bad plan.
And well, they're probably thinking you're bad too, even putting it on squidboards possibly, like "I was defending the whole game alone, guys were either flanking the whole game while their timing was bad, only killed the useless ones or turfed some useless area". That's what the lack of communication does (like in some love couples! :p).
PS: About bad jumps, well, I say "come on" when my mates are spawning, and most of the time they like the spots I'm choosing for them, so I can forced them to jump safe. If they still try very bad jumps, well, I can either try to save them (not recommended in a lot of situations) or just use them as decoy (easier when you feel it's risky to try a save).
PPS: I never actually had real losing streaks (I'm not sure I ever lost 10 games in a row, even when trying new weapons), and I think it's mainly because I make decent decisions and know how to secure a win.
PPPS (yeah!): It's kinda weird to see people saying the ranks are messed up like S and C aren't much different, and yet are having alts accounts... As obviously, having an S/S+ player at B/C is messing up the ranks. And that seems quite common (while I can't really see the reasons why having alt accounts).
