I swear, I have played a lot and I still can't get some of the agents, not even the grind to even get out of unranked. Am I doing something wrong? Or do I really need 300+ hours to get all the agents?

So i just finished a game and 3 people intsalocked jett raze and reyna so i thought "oh i might just dodge and take the 1 hour cooldown" but i just picked cypher (my main atm) and the other player picked omen, so we got into the game and we...