Google Chrome is now encouraging uBlock Origin users who have updated to the latest version to switch to other ad blockers before Manifest v2 extensions are disabled.
Don't think Google would be at fault there, at most it would be the fault of the website that served you the ad or the service that website used to serve you the ad. (Which could be Google but they wouldn't be at fault for not letting you block ads, they would be at fault for serving you a malicious ad)
That's why laws that mandate safety are important. Seatbelts on rollercoasters are mandatory, while tech companies can pretty much put anything in terms of service since they have enough of the politicians in their pocket that nobody outlaws it.