Now you've done it. Here comes the flock!

How does this benefit Anaheim giving up their best two defenseman?

replaced with Reilly which upgrades the PP.
They think Lilj can be a top 4D and replace Manson in upcoming years for longer and cheaper.
the add Johnsson who can slot in the top 2 lines for the next 4 years and a prospect in Bracco.

It only works if they are looking to retool for the future imo

Yeah don't see how you're getting both Lindholm and Manson, Without one of Nylander or another decent piece heading Anaheims way. Looks very under-whelming here for Bob Murray and Company.

You sir. Are a clownnnn

To start with, basically you're exchanging Lindholm for Rielly, which raises three questions:
1. If Rielly is more valuable than Lindholm, why are the Maple Leafs doing it?
2. If Lindholm is more valuable than Rielly, why are the Ducks doing it?
3. If Rielly and Lindholm are essentially equal, why is either team doing it?

Then you have Josh Manson, Anaheim's only quality RD, for Johnsson and two not-quite-proven prospects. Anaheim has plenty of LW quality and quantity (Rakell, Ritchie, Jones, Shore plus Comtois and Tracey in the system), so the rest of this trade is a subtraction for the Ducks.