One of two scenarios:
a) You're winning your lane with no external help, and then you start getting ganked constantly by mid and jungle, and even though your jungler / mid never help you, the other lanes are losing as well.
b) You're getting ganked non stop and losing your lane, even though you can still hold your own, but your other lanes are losing as well even though jungle / mid never help you.
This has happened to me during the last ~15 consecutive games. I play any role the team needs, I'm never negative towards my teammates, though I chide them when it's too late because the score is 3-24 or something.
Even though I play my lane well and to the best of my ability (as opponents often confirm), I feel helpless to do anything since my team always manages to royally screw up.
I understand I'm on an unusually long unlucky streak, that I can somehow accept. But the other thing I just don't get.
Is it really possible to single-handedly carry teams like these?
TL;DR: When you have no help from other lanes and your opponent does constantly, do your other lanes lose as well? If so, why?