Honestly, wrt Georgia and Crimea, the answer is we don’t have the reports of soldiers raping civilians, seemingly as a tactic, nor reports of mass graves of executed civilians. I think that’s a big part of it. And of course, that’s followed by the targeted bombing of civilian populations, and infrastructure.
WRT Tibet, the PRC is much, much better at managing its image through pressure on western media companies and control of social media channels (how many here have TikTok on their phone? Ever query it for info about Tiannemen Square? It is no better than RT or Telegram, and probably worse. Cute videos, though).
I mean- the PRC has ethnic concentration camps, race slaves, and credible reports of harvesting organs from living internees, and an income stream from sales of fentanyl ingredients to cartels, and there is no comparable western rage (our Europe allies all have national economic strategies of further engagement with the PRC). All I can figure is that they are much better at messaging than Russia.