I loved this movie so much I was so surprised at how many emphatic negative reviews there are. In response to criticisms that its references are going to quickly become outdated I think it shows a genuinely good slice of what life was like during the pandemic. It's a little bit cheesy at times but for me it adds to the charm of it.
Glass onion is a fun mystery turned commentary on people in power, cut throat politics and capitalism fuelled stupidity. I person found the ending very cathartic. You can analyse into it or you can enjoy it on a more surface level.
The fact it's so controversial should be enough of a reason to watch it and form your own opinion