It's all very pretty but there seems to be a disconnect right now- some really formal elements liked clipped hedges and topiaries with more casual things like naturalized plant groupings and big boulders. I think you need to work with a local professional to come with a long term plan for the garden and work toward that. I think some of the elements you have can be retained (especially the trees) no matter which way you go.

It looks like many of your neighbors have boulders, too. What geological reason is there for the rocks, that is, how did they get there? Or what geographic region are you in, roughly?

In my area, foothill neighborhoods near longstanding debris flow areas have rocks that are often incorporated into landscaping or garden walls. Landscape designers work with them or in some cases, bring in bigger boulders from nearby.

Some option

Looks great—do you provide virtual services like this for landscaping?

I do renderings.

Consult a landscape architect to design plans that make sense and that you can implement over time.