New feeder, still no garden birds!

We have a very small back garden, one side is wooden fence panels, covered in Honeysuckle, the other two sides are covered in ivy. We've been here years and often get blackbirds or robins making a nest in the ivy. We also have a local small colony of sparrows, which sometimes appear.

So, my issue is that I invested in a decent bird feeder a few weeks ago. It has four hanging feeders, one of which contains a suet block (mealworm-based), two others contain different types of garden bird seeds. It has a water bath dish too.

All I'm getting are a local pair of Wood Pigeons and a really cheeky Jackdaw which loves the suet block!

I've seen both the male and female blackbird in the garden (but they're not seed eaters) and the Robin has been about too, but not on the feeder.

I can't help feel that the Pigeons and Jackdaws are putting off the smaller birds from visiting, or could there be another reason for there being no takers for the food? Is it too early to tell maybe?

Thanks