What is the reality behind Peshwas house arresting Chhatrapatis and ruling defacto the maratha confedaracy ?

I often hear that the Peshwas overshadowed the Maratha Chhatrapatis, reducing the position to a ceremonial role. They allegedly perpetrated atrocities against the Mahar community, enforcing humiliating rules such as forcing them to carry brooms on their backs. However, I'm puzzled by how the Peshwas managed to dominate the Chhatrapatis despite their relatively limited numerical strength and were able to enforce such rules considering mahars were also good in numerical strength. Peshwas were Brahmins and were not really a warrior class and were more into administrative roles in alsmot all empires around india ,only in Maharashtra they were on ground and did a good job. And What happened to the Peshwa lineage? We frequently hear about descendants of Shivaji who are influential in local politics. In contrast, the Peshwa family seems to have faded into obscurity, even in their former stronghold of Pune.