It all started by the CPU dying on the first motherboard a few months after first use. After 2-3 hours of back and forward with the support agent and diagnostics (machine was dead dead, blinking orange led indicator), they sent a tech relatively soon (within a week) and replaced the mobo.
A few months go by, a year - throughout this period of time after the first repair, the CPU has been sitting at 99 and thermal throttling like hot shit. Fans screaming all the time, finally I got fed up and launched another ticket. Let me tell you, I wasted a combined whole work day over two days going through diagnostics to no end. Getting messages from support at 2, 3 in the morning with massive delay between WhatsApp messages. Finally I got impatient with them so they sent a tech out (again, within a week).
Tech says temp sensor on the cpu is faulty, changes the board over again. The bloke literally remembers me from last time. TO give credit where credit is due, the tech was a top lad. He tells me that they are a 3rd party hired by Dell - they get penalised if the repair is unsuccessful - while often relying on misleading diagnosis from the first line support teams (chat).
Immediately after the repair I started noticing another issue - when you wake the machine from sleep or launch it after shutdown, without having the DC charged plugged in - CPU is throttled at 1 GHz and the machine takes minutes to even boot. No setting fixes that, I have tried resetting, running live Linux, the same. Once you plug the charger in it springs back to life.
After a few months, today, I get a BIOS warning that the machine can no longer verify the power of the charging adapter - the machine was so slow yesterday that the mouse was lagging on the screen after waking it from sleep.
I really do not like Dell. I will never buy Dell for myself or recommend it to anyone else. Oh and around 40 percent of us at work (we all use Dell laptops for remote work in the better part of the last 3 years) have experienced some sort of hardware failure / issues.