It's quite interesting that here in Ipswich, it seems First and Ipswich Buses are fighting to see who can be the better bus operator. First have improved markedly in the last year, especially with their refurb programme and getting rid of the awful Scania single deckers they had (they only have two left in service at the time of posting this), whilst IB has always seemed to be a decent operator in my view
Yet, 20 miles down the road in Colchester, it seems First and Network Colchester are fighting to see who can be the worst operator.

I have never seen so many tatty, filthy buses in one place. Most of First's stock is life-expired S and T reg Scanias, those awful hard-seat dealer stock Scanias from the early 2000s, a bunch of assorted Volvo B7RLEs, and a few B7TL deckers cascaded from Norwich. Some of the older single deckers have been cascaded from Ipswich because of the refurb programme, and they're still running around with IPSWICH fleetnames on the side months after transfer. As for Network Colchester, pretty much none of their buses have a fleetname, and it's a motley bunch of Darts, B10BLEs, and a few ex-London deckers.
It's such a shame, because TGM did a great job of turning the Network Colchester operation around until they sold out to Arriva a few years ago. There were investments in new buses, and pretty much all of them have been cascaded away.
I think First are marginally the better operator, mainly due to the 70/71/71A routes between Colchester and Chelmsford, which actually have well-presented buses. I don't think Colchester depot runs those routes, which may be a reason why they're better...