Management, no proper development path, in-progress-knowledgbase and the food.
Certain teamleaders can sometimes make professional matters personal and let it bleed into their work persona.
There is no actual development path in sonos, most of the positions are taken by young competent individuals, who has no intention of leaving for a good few years.
There is no proper training material, only tech bulletins and current issues both with and without workarounds. (they are working on a new knowledgbase, but it will take much more time.) If you get a technical position, there is no option to grow nor is there certificates to acquire.
The food is always the same, each week - it gets tasteless after 2 months.
There is a speaker at everyones desk, some even have two and a subwoofer, it can produce a lot of noise pollution at certain hours.