Mega Level 80 Pack Guardian broken

I paid for a T3 Mega Pack Guardian full T3 equipped and while playing it for 3 months noticed it was not holding Bosses or Mobs like it used to 14 years ago when I departed from the game. On return I made a Level 1 Guardian and leveled it to 30’s before purchasing the Mega Pack 80 “Full T3”

A few weeks ago I leveled my Baby Guardian to 80 and did a T3 Raid with a severely weaker toon T1/T2 and blue accessories equipped. Immediately I noticed this self leveled Guardian was holding Mobs far better than the Mega Pack Guardian and made some in-game inquiries with other players. It seems others have also experienced the same issues with their Mega Guardians.

What can be done to rectify this huge problem ?