I tried using affinity designer in a Windows VM on Linux. This sucks. It is too slow to work fluently.
So I tried gimp. Still awful! Not as awful as in the past, but differently awful. Seriously ghastly.
I just can repeat: I expect affinity as the most modern and professional graphics software to be an easy winner with _no_ competition on Linux and it is the only application running on all three platforms which is a huge argument in heterogeneous IT environments (like ours with 25 creative workstations). And its soooo much cheaper than Adobe's old cr@p. Even my Adobe fanboys were impressed when I showed them some of the circle features of designer to create a logo.
And in my experience it is mostly a myth that teams need the 'integration' of lots of the Adobe CS applications. These dont even work that well (by far) as one might hope or is implied.