Uh, no. That's not possible.
Orr would have turned 32 in 1980 and thus would already be among the older players in an increasingly youth-oriented NHL. You'll notice that none of Park (Orr's direct peer), Clarke, Lafleur, Perreault, etc. were doing better during 1979-1983 (well, except Lafleur in 1979-80) than they had prior. They were all on good teams.
I think Orr had already faced enough "minor league cones" circa 1974-75 with his 29 games (36% of season) vs. Atlanta, California, Detroit, Kansas City, Minnesota, and Washington (the latter almost certainly the worst NHL team of all time).
It's not possible? Bobby Orr...?
Dionne broke 130 points three straight times in '79, '80, '81 - his best.
Perreault resurrected back up to or above 1.2 pts/gm in '80, '82, and '84 in his early 30's.
Sittler's 2nd best season came in 1980.
When Lemieux was playing in the early 2000's as a mid 60's birth year, was anyone else throwing that kind of heat around that birth year? Nieuwendyk was a half point per game, Robitaille wasn't even that. Yzerman was hanging in at a 70-75 point pace. Oates, Francis, they weren't even that.
Lemieux was on a 120+ point pace in that time. Sometimes great players do some great things unexpectedly.
You rather proudly announce that you didn't watch either of the times that we're talking about.
You pick on the '75 Capitals a lot. But that was a team effectively starting from scratch. But don't mention, say, the '81 Jets. But, reasonably, Winnipeg kept some guys after being a
champion in the WHA in '79.
They kept Lukowich, kept Scott Campbell, kept Willy Lindstrom, kept Barry Long, kept Peter Sullivan, obviously not the same team by any stretch...but pieces and added Dave Christian, Dave Babych, Moe Mantha...lost Kenta, Ruskowski, etc.
I'm not sure that I'd expect a team that won the championship of an apparently quality league in '79 to retain a quarter of their roster, add some pieces/lose some pieces as teams do, and then win 9 of 80 games two years later. With some context, maybe the '75 Caps aren't alone in the conversation for worst of all time...