Why are Wifi and C-type ports so slow n awful?

Hey guys, when I put my phone in the Wi‑Fi spot, sometimes the Wi‑Fi signal blinks, sometimes it is stagnant. I’ve noticed that the last few times my phone starts heating up regardless of whether the battery is at 90% or even 30%, and the temperature gets very high. I’ve also tried the USB‑C port for charging, and it took about 20 minutes to boost the battery by 10–12%, which is very slow.

Do you use the 12V port always? I have a 3‑foot charging cable and my phone will be awkwardly placed over the wifi slot charging via cable.

What are your suggestions?