"The system has been designed to ensure that voters' computers are not infected by any kind of malware that could change or block their vote."
I'm sure this cannot be subverted by an attacker with the resources of USA/China/India/.., or with access to the supply chain from the chip fab onward (don't forget about malware hidden in USB cables!), or or,...
And you'd have to be dead sure, because, unlike with physical votes, there will be few-to-none signs of subversion. You can vote physically, but what do a few physical votes matter when the attacker can change the vote of 30, 50, 70% of the population.
And how do you change the system, when all parties promising to do so can't get enough votes?
Edit: Example of what a voting system must be resistant against: https://www.schneier.com/blog/archives/2018/03/adding_backdo...