Yeah, that's the sense that I get as well. Leading up to the war, human technology was more advanced. During the war, they tried to keep up with the Cylons in order to fight them. After the war, having learned their lesson, they dialed it back, but then they became complacent and comfortable, so they began making advances again. The Cylons then took their opportunity and exploited it.
I don't think it was so much "more advanced Technology" they dialed back on, it was Computer Networking they dialed back on (which in turn often caused them to have to abandon advances not supported by non-networked Tech). The Networking was the real problem, because it could be exploited by the Cylons
One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?