Are you cleaning the surfaces with APC or a similar degreaser first?
Have the surfaces previously been treated with a silicone based dressing?
Are you applying in direct sunlight or on a hot surface?
How are you applying? Heavy coats and removing excess or trying to spread a small amount over a large area?
Have you tried wiping the areas down with a dry microfiber towel afterwards?
That resembles exactly what I've seen happen when its applied over a surface that hasn't been 'degreased' using APC or a similar cleaner. I could almost recreate the EXACT look on my wifes equinox rear plastic after the dealer slathered some black magic or armourall trim dressing on it after the last time it was in for service.
Try cleaning more thoroughly before applying, if you can see "where the bug splatter was" then the surface isn't clean.
Its not a normal issue you're experiencing (as you can see by my pics it finishes even on a properly cleaned surface) so something else has to be going on.
If it acted like that for everyone we'd have thousands of complaints - its our #2 best selling product right behind Detail Spray and rarely do we get any complaints about it.
Also, you know that if you're ever displeased with the way a product performs you can simply call the toll free number and take advantage of the 110% satisfaction guarantee.