As far as I see it, services and staffing is deliberately being run into the ground. They make Abellio-Serco under the previous franchise look good which is some achievement.
I don't think Arriva are deliberately running it into the ground, there are a lot of issues affecting services at the moment and I think they are all coming to a head. Northern are desperately short of stock, which I think goes back to the Labour government of 2004 who let out the previous franchise on a no growth basis. Then what with the extensions and direct award Serco/Abellio got, it prolonged the time before significat changes could be made
A lot of Northern's fleet needs to be made PRM compliant, and at a quick guess there's around 6-7 DMUs out of service at a time. We're also on leaf fall season, so trains are being taken out of use for repairs to wheelsets further adding to the shortages. With the EMUs, the doubling of frequency to Kirkstal Forge has required an additional unit to be used on the Airedale / Wharfedale line, however this has had to be found within the existing fleet as no additional EMUs have been added to Neville Hill's allocation. Plus the 333 refurb programme has now started
Then there's the staffing issues. something Arriva can be blamed for. They either don't have enough, or have a training backlog, which means they are struggling to cover all services
And finally, and for me the most frustrating one is service regulation. Since the timetables were changed in May there are frequently delays on approach to major stations. Leeds is particularly bad now, from my experience very few Northern services get to have a clear run in to the station with those coming off the Wakefield and Calder Valley lines the most prone to hold ups meaning they often fail PPM despite arriving at the approach to the station on time
Hopefully once the industrial dispute is resolved, the new trains are in service and the refurb programme slows down things will begin to pick up again, but unfortunately I think the next few months are going to be challenging