Try connecting laptop with wire and see if that helps? Then you know if the laptops wifi card is causing issues. If its not that could be a dns issue if your ps4 is using a different dns, ive never really looked into the ps4's dns settings but im guessing it uses a dns from sony to connect to its own content delivery network faster. You can change your dns through your laptop/router if that turns out to be the issue. Mixed results from changing dns though, doesnt always work for people.