Imo Tor is no more secure (or even no less secure) than any other network technology out there. And the same applies to others, like Lokinet/Nym. My problems with Tor is that even though it's out of the hands of ICANN (which, by now is owned by the UN and whose counter-terrorism has been pressuring web hosts to pull websites without all the previous red tape, even when ICANN used to be a neutral entity), but rather because even when you've overcome the obstacle of finding the right hosting as it would be on the clearnet, you're still not immune to DDOSing and other kinds of censorship. Plus it's not really that anonymous either, given all the recent hidden marketplace takedowns. In truth, no network technology is immune to DDOSing. Anything you can connect to you can DDOS (or try to) except for CJDNS, simply because it requires more resources to send data than to relay it. CJDNS is the only network technology that is immune to deplatforming and DDOSing as a whole BY DESIGN. But even then, it's not anonymous (more pseudonymous, like Bitcoin), unless you use Hyperboria, which is a more privacy-centered fork of CJDNS that also is DDOS-proof and also addresses the ISP issue that CJDNS doesn't, in that CJDNS can be filtered or blocked at an ISP level, whereas Hyperboria is a virtual meshnet because it runs through the existing internet, whereas with CJDNS you can only connect to other computers within the mesh network which can easily be stopped by your ISPs firewall, depending on if you have a mesh in your area. But both CJDNS and Hyperboria address the Sybil attack problem feds can use to deanonymize users in the best way possible, because through their mesh network, it is nearly impossible to create a node pretending to be another node. This is even true for I2P to an extent. They even have a manual peering process, which, while not foolproof, but only not foolproof in that it won't stop the feds from working their asses off and using fucktons of resources on some small network just to get through the vetting process of setting up nodes to monitor and control some traffic. Even Lokinet doesn't address any of this afaik.
My main problem with most of these darknets is that most of them are made to address issues others don't, but in doing so, leave others open themselves, as opposed to addressing ALL of them, like Hyperboria and even CJDNS to an extent does.
But I stand to be corrected, of course.