Mostly because our number one car is not a truck and thus the competition had to react and build EVs to compete against Tesla.
Here are the numbers I found for 2020:
1 Renault Zoe: 99,261
2 Tesla Model 3: 85,713
3 Volkswagen ID 3: 56,118
4 Hyundai Kona: 47,796
5 Volkswagen eGolf: 33,650
6 Peugeot e208: 31,287
7 Kia eNiro: 31,019
8 Nissan Leaf: 30,916
9 Audi E-tron: 26,454
10 BMW i3: 23,113
So there are many more EV cars from other brands sold in 2020 than there were Tesla Model 3. The Tesla Model 3 represented at the very least less than 18.5% of cars as I only counted the top 10.
source: https://www.autocar.co.uk/car-news/new-cars/renault-zoe-ecli...
1 Tesla Model 3: 4,277
2 Volkswagen ID.3: 1,722
3 Hyundai Kona: 1,160
4 Kia Niro: 834
5 Renault Zoe: 704
6 Volkswagen Golf: 625
7 Nissan Leaf: 566
8 Audi E-tron: 493
9 Volkswagen Up!: 369
10 Porsche Taycan: 327
Source: https://www.bn.dk/bilmagasin/her-er-aarets-mest-solgte-biler...
So the Danish electric car market was somewhat diversified, but the Tesla brand was very strong back then. Still, you're absolutely correct that there were enough other electric cars sold back than that the comparison with the Model 3 is fair.
I mean, it wasn't even really reactive; the Leaf and Zoe came out at about the same time as the Tesla Model S, and weren't competing with it (they were well under half the price). They were quite old news by the time the Model 3 launched. The VW eGolf and BMW i3 also predate affordable (sub-100k) Tesla cars being available, at least in Europe.
I was also interested in what is meant by "steering" - here it seems that the main culprit is the weight of the batteries that are putting a lot of stress on the suspension system.
Mix in wetter conditions, and salted roads in winter, and you have a recipe for disaster - the components experience all of the weather, but none of the "cleaning" force of actual braking. Anecdotal evidence, every single electric car owner I personally know has complained about brake rust here in Latvia. Even those with small 50km range plug-in hybrids, when used mainly for daily commuting within electrical range.
About 40% of the electric cars sold in Denmark in (edit: september) 2020 were Teslas:
https://www.datawrapper.de/_/Q1H9W/ (the source for this is https://web.archive.org/web/20201119015250/https://www.bilim... only available on Archive.org anymore apparently)
But the Tesla number would still be way too high.