A few talking points for you…
1.) Multinational corporations are involved in the installation, and financing of oppressive regimes, and dictate policies that undermine the economy, impoverish the population, harm workers and the environment, and suppress political opposition.
2.) Even if they are not actively influencing the governments, Multinational corporations ignore repression and human rights violations in the countries where they operate, though they have the political and economic power to prevent them.
3.) Multinational corporations demolish smaller local companies, monopolize the market, and increase the flow of money out of the country.
4.) Multinational corporations have a cultural impact; eroding a society of its uniqueness, and imposing a homogenized set of cultural standards and attitudes that are essentially Western, and pro-Western.