Google, irritated by your ad-blocking-by-default, sues you. Maybe directly about the damage to their business model, maybe over the state aid you're getting from the EU. Whether or not they ultimately prevail, they can definitely tie you up for years spending lots of money on lawyers.
Meanwhile, Google's websites aren't working so well in your browser. Your support for CSS 9 and Javascript 11 was in an optional upgrade, and a load of users haven't upgraded. Even those who have are noticing problems. You suspect Google is deliberately degrading the experience, but the only chance of proving that or stopping it is another big court case. Meanwhile, users who use GMail or Youtube (i.e. most users) are slipping away.
Neither Apple nor Google are convinced they are on the wrong path on mobile.