FCMP++ (Monero) vs ZK-SNARKs (Halo2 - Zcash) vs ZK-STARKs, a battle of security and privacy protocols

Hi guys! I have a question, which of these three protocols would be the best? Comparing the set of anonymity, quantum protection, protections in general, advantages and disadvantages, complexity of the code and how audited they are/will be by their communities, and final notes + summary.

Protocols: FCMP++, ZK-SNARKs (Halo2) and ZK-STARKs.

Thank you very much! Have a great day/afternoon/evening.