What's going on, Scotland?

I need to go over to Scotland again to help with emptying mum's house. I am looking at 14-18 May. I thought to maximise my time, I'd hire a wee car rather than relying on public transport. So I stuck those dates into all the car hire places in Edinburgh airport with a view to picking up a wee Fiat 500 or similar and paying no more than about £120. I've done that time and again so was more than gobsmacked when the best they could offer me was £457 for four days for a 4 seater biscuit tin on wheels! I figured it might be something to do with the short notice, though that has made little impact on the price previously so out of curiosity I stuck in the dates 10-14 September in Edinburgh and the cheapest car they could offer then was £422, despite it being out of season and in the more distant future. I then assumed it might have something to do either with Brexit or with the global car issues caused by Covid - I know that second hand cars are dearer at the moment globally because of chip shortages, so I played about with different destinations for my May dates. These are my interesting findings:

If I want to hire a small car in Aberdeen airport 14-18 May, the smallest and cheapest on offer is £457 (Fiat 500)

If I want to hire a small car in Glasgow airport 14-18 May, the smallest and cheapest on offer is £435 (Fiat 500)

If I want to hire a small car in Glasgow town centre 14-18 May, the smallest and cheapest on offer is £622 (Ford Focus)

If I want to hire a small car in Manchester airport 14-18 May, the smallest and cheapest on offer is £112 (Fiat 500)

If I want to hire a small car in Stansted 14-18 May, the smallest and cheapest on offer is £91 (Fiat 500)

If I want to hire a small car in Copenhagen airport 14-18 May, the smallest and cheapest on offer is £166 (Ford Focus)

If I want to hire a small car in Madrid airport 14-18 May, the smallest and cheapest on offer is £65 ( (Fiat Panda)

If I want to hire a small car in Frankfurt airport 14-18 May, the smallest and cheapest on offer is £198 (Hyundai i20)

So I can see that not only is there a shortage of small cars for hire in Scotland but also a massive hike in prices that are not reflected elsewhere in the UK or in random big cities around Europe. So, what's going on and why exactly are Scotland and its tourists being shafted?