It looks a bit pluggy because the caliber seems high but the density is low, this is a common tell of a transplant to the experienced eye. Don’t worry, your case is far from the worst I’ve seen and you can definitely fix this, as others have said. Lupanzula is a great doctor, as are the others mentioned here (many of which are also in Belgium, as it happens).
you could have the worst grafts removed and reimplanted with proper angulation, but I believe 1000-2000 grafts would make a huge difference to the density and naturalness on their own.
You could potentially lose a lot of ground without meds. Meds are like a dam, but you can’t always see how much water they’re holding back. Be careful, and remember many side effects are only temporary.