"Compact" is relative :-) At 2-3 feet wide and tall, it is certainly much more compact that the species!!

Personally, I wouldn't prune it but your choice.

I found the info on suncrest nursery which is where my plant is from. It says it has a much denser habit than other myrtle. I guess I’ll leave it and hopefully see some more bushiness as years goby. She is such a slow grower...!

i would give a recent transplant at least a year ... to become established .. before i would start cutting off energy making machines .. otherwise known as leaves ...

it needs all those leaves to row the roots.. to become established ...

in the meantime.. it will start taking on a better shape on its own.. which will make future pruning easier.. as you will be able to see where its going ... a more natural shape ..

part of what is probably bugging you.. is that its shape was dictated by the grower .... for ease of shipping.. etc ...

patience ...

ken

Shadow from fence may be affecting the density of your shrub.

Common myrtle prefers full sun. How much does yours get?