I'm not sure why you feel the need to trivialise and minimise the issue and suggest I'm exaggerating it.
Speak to any individual or organisation that has responsibility and custodianship of the more remote and wild parts of the UK countryside and they'll tell you there has been a huge increase in the number of visitors to such locations in recent years, much more than the "uptick" that you're attempting to dismiss it as, along with a corresponding increase in issues of littering, antisocial behaviour, wildlife disturbance, vandalism and damage.
I'm guessing you're not really familiar with the kind of areas I'm referring to if your experience of the UK Countryside is limited to the typical tourist honeypot spots you’ve mentioned or places you go fishing (which I'd guess won't be particularly remote)
Im not sure what your agenda is for attempting to dismiss and trivialise the issue, maybe you're not familiar with the kind of areas I'm referring to, maybe you're just not very observant, or maybe you're one of those who are scared of their own company and only feel comfortable in places where there are crowds of other people and you don't value or appreciate solitude and piece and quiet.