I honestly can't understand why on earth would a sane minded person spend all that money on apple hardware and then on top of that spend a a lot of time fighting a losing fight against the software.
Just switch to something else.
There are things which Apple Macs excel at, and no other laptop even comes close. This is not me speaking in thin air, you can yourself notice that majority of developers and creative professionals own Macs.
This is common apple fanatism bs.
Except for a few very specific workloads and iDevices development, most things can be done on windows or Linux equally well.
In the meantime, have fun with your dumbed down is where you can only run apple-approved things.
What video editing and UI/UX/illustration software would you recommend on Linux?
I know I could use Inkscape over Sketch for example but I can't see how I would be as productive as the clone functionality isn't comparable to the symbols functionality of Sketch e.g. you can create a reusable web page header element that you can paste in multiple locations with the colours + text changed via simple parameters where the rest is kept in sync with the original. Is there something similar?
UI design I do with Figma on Linux since 2 years. For video editing I recommemd looking into DsVinci Resolve.
Are there any alternatives to Figma?
I only heard of Akira. Put I'm not sure it will hit production state at any point as it never reached its crowdfunding financing goals.