I'm a foreign PhD student and have had extreme difficulties in the last six months due to the university school administration not providing the documentation required to get a residence permit in time to start working on the date agreed to by said administration. This means I had to wait for about four months past the intended start date... meaning that I had also e.g. formally canceled my work and living arrangements by that time, making me homeless and jobless while still trying to sort out a bureaucratic nightmare all by myself.
The university continues to be extremely unhelpful to foreign students (apparently there is no support at all for them despite the university having loads of foreign students.). I'm finally here, but the situation is not getting better. My experiences in combination with the issue being effectively ignored by administration has soured my feelings on staying for the years it takes to get a PhD.
Irrespective of this, I do respect and like the actual people in the department I work in, and I still am interested in my particular area of research (despite feeling like I need to take several months off already despite having done very little actual research); I feel bad about "abandoning ship", but the problem won't get better as I'm not going to suddenly acquire another, better passport.
Is this a valid reason to give other departments when inquiring about working with them, and, if so, how can I formulate this in a way which is positive?