The path to de-escalation is easy. All troops leave Ukraine's territory and all attacks cease.
De-escalation happens gradually and with steps taken by both sides. You may have noticed that there’s mixed signals coming from the US since Russia retreated from Kherson.
What it shows is that they dont stop. Now they want an entire very big country. So this is the line in the sand. Let them cross this and Poland and Romania might be next. And then maybe Hungary and Germany. And so on.
An wanna be empire/dictator does not stop at your border because they like you or they have mercy. They stop for reinforcements and then move on to you.