Please help with this weed
Last year these weeds started showing up. I sprayed them, but they don't seem to be affected by weed killer until they reach maturity. I've tried saturating the ground and pulling them out from the roots, but they just keep coming back and when they do, there is more and more of them. They have choked my garden and I am losing more and more of my plants.
Please help identify these and help me to get rid of these.