Not to discourage further responses, but a similar question was asked some time ago, which attracted a really solid answer from u/NicLewisSLU. You can view it here, and it should give some good context for your question.
I extended on their answer to provide some further information on the immediate international circumstances in the eighteenth century which led to imperial powers expelling the Jesuits. I'll quote this below:
As argued by several historians who consider such changes from the perspective of empire, hostility to the Jesuits was also augmented by their existence as a trans-imperial group. Appreciating this helps us understand why the Jesuits were expelled throughout imperial domains specifically in the mid-eighteenth century.
This was a period which saw profound efforts at centralisation among leading western imperial powers - for Spain, as one example, efforts to impose imperial authority were prompted following the War of the Spanish Succession, and in particular following defeat at Havana (1762) in the Seven Years’ War. Similar trends can be seen in Portuguese imperial endeavours (Pombal’s reforms especially).
Neither was centralisation unique to the Iberian empires; the British and French empires are further obvious examples. Imposing imperial authority and exploiting colonies more than ever before was necessitated by the experience of intermittent but frequent colonial warfare, the costs of which only increased through the century.
The presence of missionaries who were not obviously subordinate to respective imperial hierarchies posed an obvious threat to imperial authority. There is little coincidence, then, that the expulsion of the Jesuits from Spanish and Portuguese imperial domains coincided with a period of imperial centralisation. The Jesuits, then, were not just a domestic threat. Their presence was also a threat to the conduct of empire. Similar trends can be seen with other groups and bodies which may be considered transimperial. Crackdowns on contraband traders and interimperial trade, key measures in the Bourbon and Pombaline Reforms (Spain and Portugal, respectively), are one example.
There was obvious pressure from rival missionary groupings and from others in society; but it’s important to consider their role beyond the domestic. The fact that the Jesuits posed a threat to the imposition of imperial authority should be appreciated as a major factor in their change of fortune in the eighteenth century.
Select sources:
In addition to the great answers that have already been linked and provided in this thread, you might be interested in a couple past threads concerning the suppression/expulsion of the Society.