It may seem a harsh advice, but I would advise you to not be shocked by the regime’s brutality; rather you should expect it.
There is nothing unusual or unique about it, and indeed, I very much doubt that it has even begun to be as bad as it will become. Again, you can look at the experiences of others. Chile, Argentina, El Salvador, Guatemala, Suharto in Indonesia, and the brutal repression in Mindanao in the Philippines. Being brutal is the job description for the institutional role of a client dictator serving the global owners of capital.
Atrocities are a technique of social management and de-politicization under tyrannies, and they are planned precisely to shock, humiliate, and terrify you as much as possible.
This has two useful results for the regime: On one hand, atrocities can frighten activists enough to make them cease their opposition; on the other hand, rebels who are not frightened will likely become so enraged that they no longer fight wisely, but instead emotionally, in which case the regime derails effective revolutionary strategy.