Ignite false sense of security?

Anybody else feel like ignite doesn't work more often than it does work? I have so many instances where the person outheals it with a potion when they only had 100-150ish health and when i ignite and auto them once before they flash 20 yards further than i could ever flash, they use a health potion and BOOP magic! they live!

But if the situation would of been reversed, i would of flashed maybe a foot used a potion and died by just ignite and no auto attack.... Because it's happened a lot of times to me, i swear everyone else's ignite and flash work but mine never do, i mean i had one instance where i put my cursor on the other side of the small tiny wall in the mid lane by your turret to the right that is in the river, i stood right on the other side of it and needed to flash into the bush to get away, i put my cursor right into the bush and boop didn't go anywhere even though i was RIGHT BY THE WALL, , like come on i know there's bugs and stuff but man my flash and ignite are worthless and false senses of security in my situation, idk maybe riot has it out for me or something.

Only time my ignite ever works is if the person is 1 minion attack from dying, like 50ish health lmao... otherwise they can just use a potion and live even though if i did the same thing i would still die and waste a potion. leh sad pepe