Why a loaned battleship strained Soviet maintenance

Why did the Soviet Union struggle to maintain some British warships loaned during the Second World War?

The battleship exceeded available heavy-maintenance facilities, so unresolved major work made routine upkeep progressively harder even though the cruiser was handled better.

The Soviet Union handled a loaned cruiser better than the far more demanding battleship. The larger ship required maintenance facilities and heavy repair capabilities that the Soviet Navy did not possess in the necessary form. When major work cannot be completed, smaller defects become harder to reach and compound over time. The ship's condition was therefore an infrastructure problem rather than simply a failure of crew effort.