I don’t know how people browse the web on mobile with ads taking half of the screen.

In a way yes. You’re giving Google (via an increased browser market share) the power to decide the direction of the web. Their interests as a corporate organization are not aligned with yours, so they will make decisions to your detriment if they have to.

Just use Firefox. Mozilla isn’t good but it’s not evil

Might as well take shits with the door unlocked; same level of exposing yourself.

It’s not really bad per se, it’s the default on most Android devices these days. The problem is that almost all modern browsers are Chromium-based which give Google a lot of power to implement changes (see manifest v3 & web DRM). Personally, I’m trying to slowly reduce my usage of Google products. I’m using Firefox on desktop and a mix of DDG+Fennec on my phone.