I work in a place where there is agile working so no fixed desks, first come first served. It's really grating to get in after having got up before 6am, got ready, got the children ready, done the childcare drop, got the train then to find no desk is available. Usually this either means a hot desk that can't be adapted properly to correct height/position etc or waiting around until a desk frees up - possibly half way through the day! I have raised this but no feedback has yet come back from management.
There are some other issues beyond that with the job such as continually changing systems, uncertainty regarding what we can/can't do in the role and a colleague who has to be managed carefully - is unpredictable and doesn't think sometimes before speaking which can and has caused problems. Management are aware of this but the colleague takes things personally and is sensitive so nothing has changed. They also have a habit of passing over work or continually asking for input when reality is they are full time (I am p/t), are more senior and get paid more.
So aibu to consider leaving the job- I generally like the people. Whilst in theory there is scope for progression in the company my field is quite specialised so not sure whether opportunities in other areas of the business would be available to me. They are a flexible employer and have been good to me to date, happy with the pay/benefits and hours. There are reasons to stay clearly but I could probably get comparable terms with another company where I know there is an opening. My issue is the working environment, the ever changing structure and systems and the colleague.