It’s entirely possible he’s bored and needs mental stimulation. But exciting him playing games or shoving him in front of a Kong isn’t the right way to do it. Never did a dog calm down or get properly mentally stimulated by being told to run around searching for food or toys whilst their human watched TV. They calm down either through being mentally stimulated in the right manner (I.e controlled) or being taught to settle.
I’d suggest a bit of both in your case. Teach him that evenings are for settling. No interaction or games once he’s had his last walk or meal, and lots of training during the day. And i do mean training - extended stays, down, recall, flying down, paw, shake, rollover etc. the best way to tire a dog is to train it.
Kongs and puzzle mats pump dogs full of food and quite frankly, anyone who says they’re using it to ‘stimulate’ or provide ‘mental enrichment’ has no idea what they’re doing, so ignore any advice about that. Most of the time it overstimulated the dog and doesn’t give them any proper mental stimulation. My boy is genuinely the least intelligent dog I’ve ever met. He solved a ‘puzzle feeder’ in five minutes and the next time I used it, he solved it in 1. That’s not mental stimulation. And if he can do it, the average dog should be more than capable of that. Dogs are so intelligent (cockers and poodles particularly) and people do them such a disservice by not working them properly
I have very high energy, high drive dogs, and I have never ever used boxes, puzzle matts, kongs or anything else to entertain them (outside of the one incident with my boy that was an unfettered disaster). There’s no need. Dogs need engagement and structure (training sessions), not to be encouraged to destroy things or go moseying around more than they already do. Instead, they each get 3/4 training sessions a day, learning new commands of working on old ones (my second eldest girl is 11 and I’ve just taught her to differentiate between left and right - on a walk I’ll yell ‘left’ and she runs left). That’s what tires a dog, not a Kong.
Ten years ago no one used any of these things, and by and large dogs then had far less behavioural issues than they do now. The only thing that’s changed is the use of these gimmicks as a way to for people to avoid avoid a really interacting with their dog (most of the time they don’t realise it).
I also see a lot of rescues that their owners say are ‘mental’ and ‘can’t settle.’ Bam. Kong removed. Puzzle Matt gone. Dog settles.
So my advice is engage with your dog during the day in a constructive way (training), then including on walks. Dog ownership is about interaction - and it’s so sad on Doghouse that so many people use things like kongs wrong or their first thought ‘give the dog this to do’ instead of ‘work with your dog.’
Then in the evening there’s nothing. He learns to settle. Most dogs pick it up quickly once they realise nothing fun will happen when they wank about