Or just buy the actual Apple adapter from any number of other vendors. Best Buy still has plenty in stock, for instance.

I'd guess the GPs actual problem is lint in the Lightning port though. Pretty common, relatively easy to clean out too, especially compared to USB-C.

I'm in the EU. Third party ones cost the same as authentic Apple ones. If not more.

Regardless of either, they both have the same fault.

The connector between the phone and the adapter is poor. It could just be a fault with my phone but I have no way of proving this.

Third party ones are almost certainly not as good as the actual Apple ones. The Apple one has remarkably good quality for its price.

I suspect this sounds like a problem with your specific phone. Never had a problem with any lightning accessories myself.

Yes, which have the same fault as Apple authentic adapters which cost the same amount if not more.