Isn't the first question "Does the UK have a higher grant rate than the EU+ countries?"
Followed by "If so, why."
In respect of the first question there is a good chart taken from p31 this report: https://researchbriefings.files.parliament.uk/documents/SN01403/SN01403.pdf
As you can see, our grant rate per 10,000 population is unremarkable.
Sure, you might say, but what about the percentage of grants per number of decisions made - we have that too:
In 2023, the UK's total grant rate (covering asylum, humanitarian protection and discretionary leave) was 49,862 out of 74,172 decisions. That's a grant rate of 67%, refusal rate 33%, where the top nationalities were Afghanistan and Iran - both countries with high grant rates throughout Europe.
Data is also available for other EU countries, for example here https://euaa.europa.eu/publications/latest-asylum-trends-2023-annual-analysis
From that analysis we know that the EU+ recognition rate for Afghans is 61% - but, and it's a huge but, some countries also grant subsidiary protection, so not asylum but humanitarian protection. Germany granted only 46% asylum, but granted 48% subsidiary protection - so a total grant rate for Afghans of 94%. Switzerland granted 97% of Afghan applicants.
Moving away from nationality focus, you can also look at the most recent stats for the EU+ countries summarised here https://euaa.europa.eu/key-figures-international-protection-in-EU
Austria: 73% positive decisions (higher than us)
Belgium: 44% positive (lower than us)
Denmark: 50% (lower than us)
Estonia: 95% (a lot higher than us!)
Greece: 67% (exactly the same as us)
Netherlands: 64% (very similar to us)
So I don't think that you can support the proposition that the UK has a higher grant rate, much less attribute it to crafty applicants, gullible decision makers or woolly liberal judges.
Something else that emerges from the data though is the disparity in the grant rate to different nationalities, which might seem obvious but will have a marked effect on grant rates. From the Europa summary "Certain citizenships tend to lodge the vast majority of their applications in a single EU+ country. In February 2024, these included: Bangladeshis who lodged three-quarters of their applications in Italy; Ivorians who lodged more than half of their applications in France, Tunisians and Egyptians who lodged just under two-thirds of their applications in Italy, and Turks who lodged just under two-thirds of their applications in Germany."
Bangladesh for example has a 92.5% refusal rate, and if the majority of them are claiming in Italy, that is going to have an effect on Italy's grant rate.
As an aside, I was mildly surprised to see in the data that six UK nationals claimed asylum in Europe. None were successful.