Not Really. I've been with the Raiders since the 60s and Al Davis knew football. Up through the 90s even early 2000s there were some good teams.
BUT sometime in the 2000s Al had lost it. The game changed and he didn't change with it. And then he passed away.
In fairness to Mark Davis, he never tried to say he was a football guy. I think he tried to follow advice, but obviously, he changed with the wind and with whoever got his ear. And as the Raiders never did much with Derek Carr as QB no continuity was ever pursued. Carr was a serviceable QB, but never really had a big supporting cast due to bad drafting for over a decade now.
Hopefully, they can have a couple of decent drafts, and regain greatness.
No Al Davis was a fucking football disaster. A skill he was VERY good at was he knew PEOPLE. That skill carried him and changed the game forever. He smelled one of the greatest Coaches ever in John Madden, who was a football genius that built the limited period the Raiders were really good.
A key to that success is that Al Davis could smell a good player in disaster humans that everyone else had given up on. Guys like Matuszak, Alzado, Plunkett, so many reclamation projects that other teams had deemed defective, usually for personality reasons, and he picked them up and gave them something to prove, the chip on the shoulder mentality that focused talent that was usually rather unhinged when not on the field (and sometimes on).
When my cousin, Greyson, played for them, Al would still come by and see the guys and they all felt fired up and inspired by him, even though it was near the end. He even got a fan base that despite completely abandoning their City and Culture, multiple times, still wanted to stand by the Team.
That cult of personality is an amazing accomplishment. When I was in San Diego a year ago for work, the local news was clowing the Chargers so hard. San Diego people fucking HATE them for moving.
However, the modern Free Agent era in the early 90's effectively killed his People edge. In modern free agency, no one cares anymore if somebody may be able to play some ball, but has a defective personality. Now it is 100% play analysis, all numbers, no real interest in character. While there are some old school conservative culture Teams like the Packers and Giants (NYG has never even had a Cheerleader Squad) who tend to get rid of personality problems, mostly it just became about Agents selling the potential for talent, regardless of behavior.
That change killed Davis' edge of finding unsigned diamonds in the rough. With a few notable exceptions like Ken Stabler, their draft history has typically been very bad to point of absurdity (Marinovich, JaCarcus, Lando McClain, etc), which meant they were unable to build a teamfor almost 40 years.
Having the GOAT as an owner now really seems to be changing it though. Taking Cousins to teach Mendoza, bringing Linderbuam and drafting T-Zuhn, these moves seems like tried and true proven strategy that works, not the Raider Way, of doing high risk splashy shit that usually gets a lot of press, sells Jerseys, and fails spectatcularly, all flash and no meat.
I will continue to sincerely hope the Las Vegas Raiders find great success in their representation of the great State of Nevada, and prove with a superbowl ring that the only thing holding them back was the burden of the insurmountable Davis Family Legacy and a home in the East Bay. They seem well under way and I wish them well.
No doubt, no doubt. To be fair, I do not think it is all the GM's fault. 
