I've had a number of these Dells over the years, and most have been great. This one developed a problem with the wifi system that I think must be in the HW.
You can often easily replace the internal WiFi card - Intel cards were usually the best bet in my experience (especially on Linux - sometimes best to replace when you buy laptop if Linux is your main OS). I have done quite a few replacements for friends.
if just the Bluetooth craps out and you have a spare USB-A port then you can get cheap Bluetooth dongles.