I had an XPS 9560 / 9570 or something like that. Top of the line spec, mind you.

It had a Killer WLAN network card that would frequently disconnect from wifi on any OS - so much that I had to switch it out to a different one. The speakers blew up within the first year and the cooling system had to be replaced too - thankfully warranty covered that.

I bought the XPS only because I couldn't justify the cost of a Macbook Pro back then (easily 30% more expensive and the XPS was already a stretch), but I regretted that since the first day I've had it. Bulky, unpleasant to use, frequent hardware issues. Never again.