Mine is the same, screams after 10 min in
cant even do some shopping or walk a bit more.
My older son was like this, he was such a pain! Have you tried facing out and getting some sort of toy bar thing? My son basically was out of the pushchair by about 18 months 🤦🏼♀️ we then tried to switch to a toddler push trike thing. We got a cheap little tykes one and he hated it but my friend got a Doona one and it was a game changer for her! Maybe an option if your son is still having none of it by the summer?!
My little girl is like this! To get her in everytime I have to bribe her with enough blueberries to stock ALDI for a week! I found snacks are the only way lately!