Napoleon really seems to have had a big problem with the idea that other rulers might actually dare to have policies that weren't "doing what Napoleon Bonaparte wanted".
Exactly, just look at the fate of his brother king Louis Napoleon of Holland, when he actually tried to be a king for Holland (koning Lodewijk I van Holland aka koning Lodewijk de Goede (king Louis the Good)). Louis Napoleon for instance did little (or not enough) to actually impose the Continental System, which was disastrous for the trade based Dutch economy (and was thus not liked).
Furthermore he declared he was Dutch and renounced his French citizenship and tried to speak Dutch, he also made his ministers (including French ones) speak Dutch at court. He also made objections to Napoleon's plan to reduced the value of the French loans of Dutch investors.
Furthermore he refused to contribute troops for Napoleon's invasion of Russia (still he allegedly suffered from lunacy....).
Finally the British landed an army in 1809 and the French had to send an army to repel the British. After that Napoleon invaded in 1810, forced his brother to abdicate and he annexed the kingdom of Holland in the Empire of the French.
In general Louis was popular in Holland except for his luxurious and thus expensive taste.
And king Louis was a relative; most of the other monarchs of Europe were just biding their time (waiting) until they could restore the order.
Russia, Britain, but also Prussia and Austria were waiting for a sign of weakness. None of them liked that Napoleon (a parvenu) told them what to do, but some were at times forced to do so.