How does the offensive side win?　DIAMOND TIER.　I ONLY SOLO

In my experience, it's always, "We lose one by one.

We're going to die one by one.

They just wait for time to pass quietly after their friends die.

I have no vision of winning on the offensive side at solo rank.

The defensive side? You just beat the enemies that come your way, no brains needed.

I need some advice.