best time to play and WIN ranked

im currenly at grandmaster V, about to reach legendary, however, ive been losing matches back to back. Im put with players who act like bots (who i highy doubt they are), and opponents who play as if theyre far above legendary (10k-15k XP).

I would say im the problem, but in each match ive lost im MVP, with kills ranging from 15-20, and my teammates with a maximum of 8.

Im not too sure of the server i play in, nor the region, so if advice on the best time to play could be provided it would be appreciated!