From the stories I've heard and video snippets I've seen from Polish people I know, their border police are particularly ruthless! There is no survival blanket, cup of tea and plate of biscuits on offer and those that manage to get over some pretty large fences are then escorted back to the top of the fence and unceremoniously dumped over it. Meanwhile, the land borders are patrolled by equally ruthless police and potentially some vigilantes who aren't very pleasant when they find people crossing illegally. I guess they've made the country not very inviting so have seriously limited the number wanting to go there.
They have, though, taken a very large number of genuine Ukranian refugees.