When Boston runs the offense from the wings, Milwaukee completely disregards the weak side shooter and puts the extra body in the paint. We can't get the ball to the shooter because of their length, so we're effectively playing 4-on-5 on offense. Milwaukee then uses the extra body to further disrupt passing lanes without risk.
We haven't figured out how to counter that yet. We can run some semblance of an offense down the center of the court - from the top of the key or in the paint - but even then, we're just not hitting shots.
It's ugly right now.