"In 2019, a financial report [PDF] showed that royalties, paid for setting Firefox's default search engine and understood to be largely from Google, make up the bulk of Moz's regular revenue."
That's the issue, it's a bit like people moaning about the BBC's impartiality when the Tories constantly threaten to remove funding because it's not a propaganda clone like the Daily Mail.
How can you moan about things like Telemetry being enabled by default (and explained well with the offer to disable during install), when they've used this anonymous telemetry data to redesign the UI? Likewise, how do people expect them to completely cater for privacy and yet rely on google ad funding? We need privacy, but companies can only exist with financial income unfortunately, so they're stuck between a rock and hard place.
I'm sure we could have a browser that blocks pretty much everything and makes it near to impossible to be tracked etc.. but it will need someone wealthy and paradoxically liberal to fund it.