Game is just Unplayable on XB1

On Xbox One S this game is just unplayable. It takes about a week to get to Epilogue due to serious load times in and out of portals and waypoints 1 minute minimum each time up to 5 minutes. on top of that Frames drop massively anytime theres more than 10-15 enemies on screen so you just die so it almost impossible to clear even tier 1-2 maps kuz u die from just the massive frame drop and lag spike. I use to be able to get to tier 14-16 maps before it started to drop frames badly.