They haven't learned anything and they apparently are too dumb to figure out what they were supposed to be learning. Here is my favorite parts of the report done by the group working with the Department of Justice on this topic.

“We carry substantial concerns regarding the PPB’s training and implementation of non-force and verbal techniques,”

“There appears to be large-scale confusion regarding the intent of de-escalation within the Bureau and the confusion has yet to be adequately rectified through training and the evaluation of force events.”

In the January incident near the TriMet bus, the involved officer said he violently threw the woman to the ground because he did not want her “to be able to attack or interfere with other officers around that were making arrests.”

https://www.documentcloud.org/documents/4105940-COCL-Report-October-2017.html

What's concerning is "large-scale confusion regarding the intent of de-escalation"

The COCL says the issue comes down to how Portland cops are instructed. During training sessions the group observed last month, they found instructors “undercutting” the policies they were there to teach: One instructor “emphasized that de-escalation should be used ‘when time and circumstances reasonably permit,’ underscoring the notion that this is not a required set of behaviors,” the report says, noting that other agencies devote entire days to de-escalation tactics. “The COCL has found it to be an uphill battle to get the PPB to treat these issues as important.”

Fucking knuckledraggers can't even figure out what people are upset about. "I told him to fucking stop or I was going to shoot him!? How is that not deescalating?! Herp derp im a fucking dumbass"