I currently have a problem and although my ps4 is faster with WLAN than LAN I have never seen because LAN is actually always much better than Wi-Fi for me the download is faster with LAN but the upload is very bad and if I switched LAN on I can't play because it is so bad, although it was much better earlier. Do you have any ideas to improve it?
Maybe cable broken?
LAN connected directly to your router?
If so, something is wrong with the LAN connection. LAN is ALWAYS BETTER!
How can I tell? Everything good on the outside
Yes, I know that MAN is much better but funny
Maybe your cable could have a too low quality, depending on the distance / length there's also a problem with.
You did not answer my question
Yes is connected
Then check Lan cable with another device! If proglem still there → Lan cable swap if problem still there → buy new router / get technician
Try it on the PC or something
