Labour, LibDem, Green together also would have a majority, and hopefully people would vote tactically for Labour if all the right wing votes would go to one party as well, though you never know. So I'm not sure I agree with that part of the analysis.
Otherwise: yeah, it's at least as, probably more, accurate to say Tories lost, as it is to say Labour won.
By the way the votes fell, 38% seem to have voted Tory or Reform. Ignoring how people would vote differently if the system were to change, that to me implies proportional voting would still see the right wing lose. Not nearly as much as they did now, but perhaps more securely.
I just hope Labour will think of this similarly and actually do something to make sure we get a system where that 38% doesn't overcome the rest and leads to a Tory or even Reform government.
I'll just add that Fidesz (the right wing governing party) started out centrist in 1990. In 2010 they'd moved towards the right, but in a lot people's minds they were one of the big, reasonable parties since the end of Soviet control. And also just in general "the opposition".
The social democratic governing party also was inept and admitted as such (see Őszöd sleech).
So what happened was the left side of the spectrum lost all support, and what in many people's minds was the centrist or centre-right opposition picked it all up. Just over half the votes gave them a supermajority and from that point they gradually attained complete control over all institutions as a result.