Have had my SP4 Pro for over a year. No issues and love it. Fast, reliable...
I have a Surface Pro 4 and my wife has a 3 and neither of us have any problems in the two years we’ve owned them. Very reliable and just the right size.
Even Consumer Reports says you have a 75% chance of being OK in buying one for that length of time. . . so three out of four buyers of these devices are like you. On the other hand, the odds for the other buyers were worse than playing Russian Roulette. That seems to be the problem.