I review PRs daily and people are pushing changes that have basic problems, not to talk about more serious flaws. The amount of code an engineer can produce is higher, but it's also less thought through.

There will be more code with lower quality. If you want to be valued for your expertise, you need to find niches where quality has to stay high. In a lot of the SaaS-world, most products do not require perfection, so more slop is acceptable.

Or you can accept the slop, grind out however more years you need to retire, and in the meanwhile find some new passion.