Re-Sign Aron Baynes
Re-Sign Marcus Smart
Re-Sign Jabari Bird (trade him and cash for super protected 2nd later in year)
Sign Brad Wanamaker
Sign Robert Williams, III
Sign Walter Lemon, Jr.
Sign PJ Dozier
Sign Jeff Roberson, Justin Bibbs, Nick King, Marcus Georges-Hunt - waive all later in summer
Sign RJ Hunter
Sign Greg Monroe
Exercise option on Guerschon Yabusele
Exercise option on Jaylen Brown
Exercise option on Jayson Tatum
Waive Kadeem Allen
Waive Abdel Nader (then trade him and cash to OKC for Purvis who was waived immediately)
Waive Jonathan Gibson only to re-sign him later in year
That is it. The team did absolutely nothing except bring back 3 free agents (1 was Bird), sign its draft pick, and sign a couple of deep bench players in free agency.
You want to know why Boston had a crappy year, because the management didn't do a darn thing to make the team better, to fix problems, or basically do anything at all. This disaster of a post-season is 100% and directly on Danny Ainge. He did nothing.