My simple rule is: if you can’t write a decent library you won’t be able to write a well designed microservice. Microservices have all the challenges of library design plus quite a few more.

+1

We have to keep in mind that not all software systems are designed by savants, and even ones that are might be constrained by business needs from rearchitecting them when they need it

That's what I was trying to articulate in the end.

Microservices are generally less complex.They can appear more complicated because companies who are choosing to transition usually do so after a problem. These problems are often due to poor monolith design.

Teams that design poor monoliths typically have neither a software or solutions architecture proficiency