“Tenants” are people who need housing, but aren’t lucky enough to have the wealth to buy their own house, “landlords” are people lucky enough to have excess wealth so they exploit the fact that people need housing by inflating housing values and making less wealthy people pay their mortgages all under threat of eviction.

“Capitalism” is a system of exploitation where those lucky enough to have excess wealth get to control and rig the economy in their favor by siphoning wealth from those with less to those with more.

Being for tenants and against capitalism are inherently linked, you cannot be one without also being the other. Any and every measure that is pro-tenant is also inherently anti-capital and vice-versa there’s simply no way around that.