Lots of potential things to check before assuming there is a fault.

How old are the tyres ? How much grip is on the tyres ? What brand are the tyres ?

Cheap chinese 'ditchfinders' are notoriously terrible for handling.

Finally, the Discovery 2, handled like a giraffe on rollerskates when new. It vaguely went where you pointed it, and rolled like a barge in a hurricane while doing so.