The article also doesn't really outline anything that makes sense as a motive. I'd imagine there are a number of artists in Poland critical of ... pretty much anyone you care to name but especially the Russian leadership. Artists are hard to please.
The article seems to be hinting this was a Russian or Belarusian assassination, which might be true. Sounds like someone assassinated him. But if so there is a big hole to fill in the story on what a plausible reason is. Based on this my first guess would be that something in his private life spilled over, but I expect there is a section of the story that isn't in the news right now.
EDIT Also related only by the vaguest vibe, but https://en.wikipedia.org/wiki/WeiweiCam is more what I'd expect for artistic dissidents and is truly remarkable modern art.
The article seems to be hinting this was a Russian or Belarusian assassination, which might be true. Sounds like someone assassinated him. But if so there is a big hole to fill in the story on what a plausible reason is. Based on this my first guess would be that something in his private life spilled over, but I expect there is a section of the story that isn't in the news right now.
EDIT Also related only by the vaguest vibe, but https://en.wikipedia.org/wiki/WeiweiCam is more what I'd expect for artistic dissidents and is truly remarkable modern art.