When they flash me it feels like some good 4-5 sec, but when I do i get insta-killed as if they weren't flashed, or they are flashed for like 2 sec I don't know what am I doing wrong

So hear me out fam. I was silver 2 last weak, duo queuing. Then we both got demoted to bronze. He left and and I went alone. Iron 3 same day, while getting 38 kills. People hate comms at lower ranks and are extremely toxic. I was fed up...