Illustrator is unusably slow in MacOS Big Sur

Hello Adobe Community, 

I am having a terrrible experince with Adobe Illustrator in MacOS, the app turns unusable with any file that has mildly complex vectors or large size embedded images. It becomes laggy and unresponsive. 

I have tried almost all the solutions that I could find online and in the support community without improvment, some of the fixes that I tried: 

1. Disabling keyboard dedication 
2. Turning off font preview
3. Using GPU/CPU views
4. Turning off overprint preview
5. Reducing undo count to 50 
6. Turned off data recovery for complex files 
7. Reset NVRAM
8. Disabled Anti-aliased atrwork
9. Disabled Automatic Graphic Switching in MacOS preferences 

I have a MacBook Pro (15-inch, 2016), 2.6 GHz Quad-Core Intel Core i7, 16 GB RAM, Radeon Pro 450 2 GB Graphics, 256GB SSD. It runs MacOS Big Sur Version 11.5. Adobe Illustrator Version is 25.3.1.

I hope someone can help if fixing this issue.

Thanks in advance!