It does not look very well proportioned to have the large pines pinched into a bed that is not near big enough to "hold" them ... so expand that bed and bring it out several feet beyond the pine trunks. Create a sharp, crisp line that divides the bed from the lawn. It can be straight across, parallel to the fence, or it can terminate with an "S"-curve at each end, as in the illustration. Fill the expanded bed with the same ferns that are already there. You can formalize the bed with an 8" wide brick mowing strip (flush with grade, not raised), concealed metal edging or the very common "trench" edge which is nothing more than a 3 to 4" deep earthen trough that corresponds with the bed and separates it from the lawn.

The whole scene will not look really great until you get the lawn to be nice looking, too. All of this could be accomplished within the current season. It might take another season for the ferns to fill in, but you should be able to divide some and distribute them into the expanded bed space.

Gotcha, I didn't think about expanding it outward but that makes a lot of sense... i suspect the needles are part of why the grass isnt growing well. That and a TON of hot sun on it all day.

Our backyard is a bit larger than yours appears to be but we have/had a similar issue re pines and wanting a 'crisper' look. Our pines are not as close to the property line as yours appear to be and we had the space to have a relatively wide bed. That gives us room to plant shrubs and larger perennials under the trees as well - you can see how thin and see-through your pines look at the base - it would not be surprising to see them lose those lower branches in the not-to-distant future, making additional screening plantings under them desirable. We tried various approaches to making a 'neat' edge to separate the beds from the lawn. What has worked best - and easiest - for us is to put a path (just the natural bare, packed earth with a topping layer of fine pinebark mulch mixed with concrete sand) between the lawn and the beds. Because our backyard is very shady, the grass is fairly week. Any incursions of grass into the path area is very visible and easily removed. The interface between the path and the lawn is kept reasonably 'crisp' by using stakes and string one or twice in the growing season to neaten the lines if they get a bit blurred as the grass grows. Here's a couple of views of what ours looks like - maybe you can adapt some of these ideas to fit your space.... (It can take a bit of experimenting to figure out what will grow under the pines!)

Looking down from the house at the end of June last year:

In late May showing the entire path around the lawn (over-seeding needed on the lawn at tat point and some correcting of sloppy lines at the lawn edge...): It's not a look that appeals to everyone perhaps but we like our 'green and serene' backyard that functions very well for us.