What nationality was not happy with the Russian empire in the 19th century?

Various nationalities within the Russian Empire were dissatisfied during the 19th century, particularly Poles, Ukrainians, and Finns. The Poles, in particular, experienced significant oppression and sought independence, leading to uprisings such as the November Uprising of 1830 and the January Uprising of 1863. Ukrainians faced cultural suppression and Russification policies, while Finns sought greater autonomy. These nationalities expressed their discontent through revolts and movements for national identity and independence.