I am solely a dps main so I feel I can voice my opinion on this, I’m relatively new to the game but my friend has been helping me, I’ve reached masters but I’m sitting at diamond 3 currently, why can’t people get any final blows?

We have lost several games tonight as the other dps as just been shooting at the tank or occasionally spraying into the backline, no full kills or anything significant, I don’t understand how or why

This will sound like a rant I apologise but I feel I’ve played pretty well and consistent, but then a dps who can’t kill anything will complain about our supports or our tank when its them that is the weak point, bragging about their damage or supposed ‘kills’ when they have had no significant impact all game

Is there a way around this? Is there something I can do to carry the weight of both dps? Or is this inevitable on overwatch? (I only have I think 110 ish hours on competitive and less on unranked) sorry about how ranty this sounds, loss streaks suck ass.