I've worked support, it truly is hell. I reserve most of my empathy for the front line support staff. When things are shit, it's almost never the first line support staff's fault, so it's not fair to take my frustrations out on them.
It was one of the best experiences in my life and 'software' in that system was quite the gamut. I loved over anything being the voice of the customer, bringing back some reality in an org that can be quite bureaucratic, myopic to real needs and forgetful of problems.
It also was the time I spent the most political capital and when I discovered I was appreciated but to a point and that you can be right and lose, and that some people feel the customer is 'the other team' and you play 'for them'. Quite eye opening about what happens when words (customer obsession) meet KPIs or actual incentives...
Bit of an eye opener that.
* Also unfortunately, most companies' hiring mentality for support is "warm butts in seats", and to top it off, oftentimes they prohibit their support from providing any kind of resolution to various genuine issues. In which case it definitely is hell, and the fact that people continue in these positions rather than jumping ship at the first opportunity only enables these businesses.
I did all of this, was good at my job, and there wasn't a language or cultural barrier. It was still hell.