I would say that this is both a first world problem and one of infrastructure. I do have sympathy for people living locally to, for example Dover, but not much for folks who travel en-mass on the first day of the school holidays.
I travel to India a fair bit and passport control is a ball ache, getting visas is a ball ache, it doesn't adversely effect my life because they have the infrastructure to cope. We simply don't, and I can't see dover being expanded much, there isn't the space so this may well continue.
We really didn't prepare for this at all, and you have to assume that is by design, though I can't for the life of me see why, beyond blaming the French. This bit really confuses me.