Man, there's a lot of negativity here.
Yes, flying in Europe *on average* is less convenient, and more expensive. However there are many parts, and countless little air strips, which are absolutely fantastic for GA. I grew up and then flew in Europe for many years and some of the best flying I've done has been there; little French country air strips, farm strip flying in the UK, lunches in Belgium, exploring new cities across Germany and Eastern Europe, flying to the beach for picnics in the NL.
There are multitudes of new countries to visit, so much more varied and interesting than the US; from Scandinavia down through Western Europe to the Med, across to Eastern Europe. There are many more interesting destinations than the US, and the history and architecture is wonderful. Even hopping down to North Africa is entirely practical.
If you just fly boring circuits, or back and forth to the same old destinations, then Europe is clearly worse. Even for touring, having all these different countries with different regs, as well as challenging airspace, means you have to approach your flying with much more discipline than in the US. In southern Europe in particular airport opening times, fees and fuel availability can be a challenge. But for a competent and adventurous pilot, the rewards are worth the hassle. US flying is easy; but European flying maintains interest and novelty much, much longer.
Now let's not get started on Africa and Asia...! If you think Europe is bad, they'll blow your mind.
Every one of the below are taken from flying trips in Europe. Flying there isn't for everyone, it needs a lot of competence and skills that just aren't developed in the US, but it's well worth it.