It's not just Google, the UX is degrading in... Well everything. I think it's because companies are in a duopole, monopole etc position.

They only do what the numbers tell them. Nothing else and UX just does not matter anymore.

It's like those gacha which make billions. Terrible games, almost zero depth, but people spend thousands in them. Not because they are good, but because they don't have much choice ( similar game without gacha) and part the game loop is made for addiction and build around numbers.

To offer some additional causes for the degradation of UX:

1. An increasing part of industry profits started coming from entertainment (or worse, psychological exploitation) instead of selling the customer a useful tool. For example, good budgeting-software has to help the user understand and model and achieve a goal, while a "good" slot-machine may benefit from confusion and distraction and a giant pull-handle.

2. "Must work on a touchscreen that fits in a pocket" support drags certain things to a lowest common denominator.

3. UX as a switching-cost for customers has started happening more on a per-product rather than a per-OS basis. Instead of learning the Windows or Mac "way" of screens and shortcuts, individual programs--especially those dang Electron apps--make their own reinventions of the wheel.