Lake County is small and rural, with a high poverty rate, but it has a relatively high cost of living and a high end population rubbing elbows with the poor. Some years ago it had a high number of narcotics registrants and parolees because it was rural and poorly policed - too few officers and deputies, and too poorly paid to attract many qualified applicants who would stay for a career (especially when the cost of housing was out of whack with the wages). There are, however, a number of interesting tales that came out of there, but no more or less than most rural counties in the state (mine included).
I can hypothesize all day as to the delay. Suffice it to say that real life is not like TV, and bringing a case to trial is not something that can be done in a a single episode (i.e. an hour). If I had to guess, I'd say there was a deep dive into the suspect's background and a search for additional victims, and that can take time.
Even if the DAs are fully funded (and I don't know of an office that is) the courts are also understaffed. The unintended consequence of the effective decriminalization of drugs and most thefts is that the misdemeanor offenses whose fines provided a good chunk of the court's funding is now gone. As a result, court staffing has dropped and their ability to accomodate court proceedings is impacted. In the county where I live and used to work, Traffic offenses would be arraigned three weeks from the stop and trial 2 to 3 weeks later. Now, it is not uncommon for a court trial to be 6 months out. More serious offenses, even further. I had been retired for more than a year when I was subpoenaed for a preliminary hearing on a stalking, felony battery/DV, and maiming case. And, in the county where I currently work, misdemeanors that ARE charged (most aren't) are set for trial more than 6 months out from the arraignment - my experience is 8 to 9 months.
Bottom line is that the system is slooooow. It has long been slow, but in recent years with reduced funding and changes in the laws, things have only gotten slower. So long as the rights of the accused are not violated (and nothing you have stated thus far says that they have been) then this is the system that will proceed forward into the future.