I presume in your view, it would be best if governments cut the middle man and seized all land, but alas, they are too incompetent to extract any value from it. So like the EIC of old, they must rely on landlords.
That is an interesting view of private property. It certainly explains a lot about about modern rental problems.
Yes, you can see this alternatively as the government renting out the land. And that's a fine view. Landlords pass on the land, but also put buildings on top. What you pay monthly for your apartment is partially for the land (which would go to the government, indirectly) and partially for the building and amenities and maintenance.
What they think should be done about that depends on exactly what type of leftist they are. However, most do not think that the land should be seized by the government. Many are fine with private ownership but feel that systems (such as the land value tax in this discussion) should be put into place to help ensure that the land's value is shared by society. On the other hand, anarchists might feel that land should be owned collectively by those living on it and managed by them democratically.
I think that most leftists would agree with you; realizing that landlords didn't actually do any labor to earn the money that they receive opens ones eyes to a lot of the problems in our current system of housing.
Another is that the government is simply a service provider which you pay a yearly subscription to.