The bug you found looks like an Otiorhynchus (a vine weevil). However the damage on your plants, as far I can tell in the fuzzy pics, is not that of a vine weevil. Feeding weevils make notches in the edge of the leaf, sort of like a hole puncher. Adults aren't generally a major problem, but their larvae are terrible because they munch on roots!
As for what's wrong with your plants, any chance you can take some photos that are focused on the plant and not the background? It would make it much easier to see what it may be!
__________________ Camille
Completely orchid obsessed and loving every minute of it....