Diamond: why are people playing so scared?

Got back to the game after a year break. I can play whatever below plat (duo rank + 1 random), but starting from diamond you can’t just rat for placement, you need kp so I’d drop next to a team and try to wrap it up quick. The problem is the random runs away, even when it’s just 1 team approaching and the fight hasnt started yet. I legit don’t understand.

And it seems that they think they can just craft banners but the outcome is always spawned killed by the nearest team. Ofc only then do they turn the mic on and start to bash how shit we are etc.

Or am I doing something wrong here? I’m tired of slinging between d1 and d2 for weeks.