I live on quite a busy road. There are double yellow lines outside my house so I have to park on the drive and it is not always easy to get off, but it's OK.
Next door are an elderly couple who have a lot of help - nurses, carers etc all through the day, every day. Lots of different people and cars. They have room for two cars as well as their own on the front, plus a grass verge in front of their house where people sometimes park in a pinch (due to the double yellow lines). This is all fine but sometimes I come to leave the house and someone has parked right across the front of both drives, or today, parked on the pavement, just nosing into their drive, slanted so I can't get out of mine!
There's really nothing I can do - I don't want to involve the neighbours as it's not their fault, I don't want them to feel responsible for their carers and they are really quite elderly and easily confused (find it hard to remember our names, for example). It's different cars too.
So IANBU to be annoyed, even though there's no solution!