In your own personal opinion it's an "expoit". But if it's functioning within the consensus rules, then technically it isn't. But this is is what I'll tell you, and I believe we could be of the same opinion,
- Ordinals by itself is not technically an "exploit", BUT it can be used as an attack vector to impede and interrupt financial transactions in the Bitcoin blockchain.
they use a validation bypass mechanism.. a thing that is bad for bitcoin.. known as a trojan horse

frankandbeans, you're making it sound as if there's truly an "exploit" that "hackers" could covertly use to break the consensus rules. Laughable.
you do realise that this junk is causing a form of DDoS attack.

"DDOS Attack". The network congestion IS TRULY annoying, but there isn't anything like what you're making everyone believe that there's an "exploit" that "hackers" have been using covertly to break the consensus rules. The high fees are simply the product of increased demand for having their transactions to the next block + the fee market.
Can anti-Bitcoin trolls use that to take advantage and spam the network? Yes they could, but it will come with a cost of paying higher fees. The bad-actors will waste their Bitcoins merely to cause a temporary inconvenience. From Bitcoin's viewpoint, where did it fail? Because it didn't. It's still chugging along producing block after block, incentiving miners for providing security the network.