I gave up Adobe last year and switched to Affinity and Da Vinci Resolve for video editing. I never really used Illustrator too much so I can't comment about the differences. It was a learning curve for me to switch programs - that part was the most annoying.
I really can't complain about the differences.
The one thing Adobe did really well is After Effects... I miss it. But I'm getting used to Da Vinci Resolve's Fusion.
What Adobe features do you think are lacking in Affinity?