Duff really doesn't seem like the type to bail on a commitment to his country this early over the results. Especially when you consider how covid affected the teams they were able to put out and the fact that he has a high opinion of Kenny by all accounts.
I think he's looking at the current squad.
No recognized striker good enough to do a job since McGoldrick bailed.
Not a single Irish player getting game time in the top 14 clubs in the Premier league apart from the odd appearance from Coleman and Doherty.
Could be 2 or 3 more years before the likes of Connolly, Idah, Parrot and Molumby are good enough to impact at this level.
No recognized DM who is good enough for this level.
Shane Duffy all but finished at the top.
I think based on what Duff has seen in the past 8 games without a win or a goal against average international sides, he's probably predicting we will take a few serious spankings in the next campaign against Serbia and Portugal and probably feels there's very little he can offer by way of trying to polish a turd, and probably feels he doesn't need the upcoming stress and hate that will come his way.
The next campaign is already a write-off to be honest, but I'd still be happy to see Kenny given time to develop the young players so that they'll be ready for the campaign after this upcoming one.