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This shouldn't have been downvoted because it is exactly correct.
Cryptographic generators don't work like PCG and xoroshiro and Mersenne Twister. They're generally built by taking a cryptographically secure cipher or hash core, 'keying' it with secret entropy, and running it in a streaming configuration (like CTR mode).
A properly designed CSPRNG can only be 'cracked' in a few specific scenarios:
1. The primitive it's built on (or the streaming construction it's configured in) is broken, in which case the news for cryptography as a field is significantly bigger than the fact that an RNG has a flaw.
2. An attacker has exploited a systems flaw to directly disclose the contents of the memory the CSPRNG is operating out of, in which case you have bigger problems than your CSPRNG.
3. The secrets that key the generator have become predictable. This is in practice the only way CSPRNGs get broken (unintentionally), and, in practice, always means the CSPRNG wasn't initialized properly (the 'cold start entropy problem').
You should use the getrandom() system call, or read from /dev/urandom, to the exclusion of all other mechanisms.