u/Revolutionary-Fan743

i have so much crab grass in front lawn, this year i started properly taking care of lawn, got weed man company service few iterations of weed removal and 2 fertilizer rounds. but noticed a lot of crab grass, do i need to manually remove it all and then reseed ? it is a lot of area to cover

i live in brampton canada, im situated in a house with easement and thus the slop and un even ground, i thought about levelling but i cannot due to easement. and with each year its becoming harder and harder to stop weeds and have lush grass. would appreciate help in what steps i can take to fix this. thank you