Mercury etc accumulates to the end of the foodchain, sure, but I vaguely remember a study that made the news in Sweden a few years back about limiting your intake of pesticides.

If I remember correctly it was far better to eat organic vegetables/fruit and “normal” meat, than the other way around, and only marginally worse than all organic. The explanation being mammals have kidneys and a liver that we no longer eat (most of us at least).

From this one could guess insects could be worse than steak.

Sorry I don’t have a reference right now, or know if this research was heavily skewed somehow by the meat industry. I would be happy to hear more from someone knowledgeable on the subject.