Yeah, not really surprised. The writing has been on the wall, but I was still hoping for Tsunoda to get the seat because he's put in the effort. RB has been shaping him as a driver for 4 years and then instead of promoting him to the main team they essentially pick a reserve driver over him. How shitty is that? It might be understandable if he was better than Yuki, but Yuki is the better driver. And the spat between Perez and Lawson showed that Lawson is also hot headed like Tsunoda. I know Tsunoda had his huge tirade at the start of the year but Ricciardo seemed to set him straight and he has clearly cooled himself off since then.
Anyway, it's a nice finishing touch to the "stupid decisions RBR has made this year" list.