I am a lurker here but I got to defend Xiaomi. I'm using Mi 4c for over 2 years now and never had a problem with it. Until now, it can still play all the latest games, camera is great, abd the battery lasts a long time. I'm also a careless person and dropped it more than 50 times. Only needed to repair the tempered glass. I always get it wet too but it's still functioning. It has an official update to Nougat. The long term experience for me is a great one. The specs, updates, and durability are satisfying and I haven't considered replacing my mi4c yet. Not to mention the usb c port which most of the latest phones are just getting it now.
TLDR: You're just unlucky.