[KptMarchewa]

This might fit the UK or Netherlands, but not overall Europe.

[foota]

This article provides a fairly in depth coverage: https://www.nature.com/articles/s41598-017-18646-7

Tldr forest coverage peaked 8k years ago, stayed more or less there till Romans, went down some couple dozen percent, paused after the Romans, then was decimated (heh) in the medieval era and modern times before now starting to recover.

[KptMarchewa]

I'm not disputing that forest coverage dropped significantly; "There's almost no fauna and flora in Europe" is very untrue though.