Isn’t that a prerequisite for enshitification? Publicly-traded companies are required (by law, I think) to maximize profits for their shareholders, even if that means utterly ruining their original product (Reddit, Boeing, etc.), yes? What do you think?
After being acquired by Google, YouTube got better for years (before getting worse again). Android really improved for a decade or so after getting acquired by Google.
The Next/Apple merger made the merged company way better. Apple probably wouldn’t have survived much longer without Next.
I’d argue the Pixar acquisition was still good for a few decades after, and probably made Disney better.
A good merger tends to be forgotten, where the two different parts work together seamlessly to the point that people forget they used to be separately run.