I'm a simple emigrant and I live in rented housing

I'm opening the news lately, and there: rents have risen, mortgage rates too, tenants are increasingly being pushed to go against landlords. In large cities, rent rose by as much as 51% over 10 years. Wages, meanwhile, did not grow proportionally. The reasons are clear: urbanization, crises, there is less housing being built than needed, loans, materials and energy are expensive. Like in the Snow Queen, to build a house developers must assemble from blocks A, O, Z and P. The Institute of German Economy predicts that housing prices will rise another 3–4% this year, and, by their words, this is not the limit. In connection with this, like spring poop after the snowmelt, a business of “helping” has blossomed here, which allegedly will lower tenants’ rents. That trend scares me. Because I have not yet seen noble people stand up to defend someone in such a situation. And my intuition has not failed me: if such a firm helped, then it takes all the recovered money and rides off into the sunset, leaving the landlord and tenant with reduced rent payments and shabby relations. But it’s all legal: if the price is more than 20% above the average for the district – you can go to court. At the same time, the state itself restrained prices with laws (Mietpreisbremse, Kappungsgrenze, rental registry in Berlin). The idea that a current tenant cannot have their price hiked at random seems logical to me. And with new contracts, it turns out life has become more expensive, while the state forced decades of keeping cheap rent. Of course, this is good for us, the tenants. But were the measures effective if rent in Berlin over 10 years still rose by 70%? Now there is a huge difference in housing costs between districts. But the state is trying to force people to keep the average price comparable to what it was 10 years ago. Although, to be frank, that data isn’t the most up-to-date. And from the landlords’ side it’s unclear why they, as entrepreneurs, can’t increase the income from their own asset when life gets expensive? For this you can even be charged if the excess exceeds 50% under certain conditions the owner will be accused of Mietwucher or "rent gouging." That means the owner risks everything. And that means a private investor will think a hundred times before buying a new property, and thus control over the rental market will be concentrated in the hands of large corporations. Besides, who would want to invest in improving an apartment if you won’t raise the rent? Tenants get the worst quality housing, and terrible mobility conditions. That is, they choose to live in their current housing, even though it may no longer suit them. This slows the normal market balance and hinders the efficient use of the housing stock. And it’s no secret here that cheap apartments are commonly rented out sublet at inflated prices. That is, instead of the owner, an unscrupulous tenant profits from the property. In short, the topic isn’t simple. You can’t endlessly raise rents either, because in Germany more than half the population rents housing. It seems to me that you could ban and restrict to the limit, but without building new housing a win-win won’t happen. And what do you think, is your rent fair? Or perhaps you even know someone who has already sued? #Ordnung