From my experience, enterprise apps are generally complex because they are a combination of:

- environment: integration of a large amount of services - and a good amount of them are legacy and idiosyncratic

- use case: enterprise app are at the intersection of real life and the virtual world: the rules are messy, illogical and have a baggage of 20/30+ years. Thus they cannot be changed at all. This is IMO the main difference between a "pure" greenfield startup kind of project and the enterprise one.

- add another layer of burocracy and complex environment to navigate

And with that you got the enterprise app world :).

In the end whatever framework is chosen, the most important property is the availability of common language/patterns.