There's a great initiative going on right now trying to hold Ubisoft and other game publishers accountable for shitty practices like this by trying to petition governments from a few different nations to create legal protections for people to continue to have access to their games they purchased after the publisher decides to abandon a game. If you live in an EU country especially, you might be able to help sign a petition still: https://www.stopkillinggames.com/
This company is the laughing stock of gaming right now