Why do you find it hard to blame Google (the business behind Chrome) for making a business decision of pushing for Chrome installation? This is a straightforward relationship.
[1] As it happens Google advertising Chrome on Google websites seems fairly reasonable to me, but anyway.
This is the very definition of monopoly abuse: Using your monopoly in one market (search) to push into another market (browsers). Exactly what got Microsoft in trouble in the 90s... and looking at firefox marketshare, it's having exactly the same results.
I find it hard to blame Google or Chrome for that. It's a developer (or business) choice.