Unfortunately, many people have encountered similar stories, so you're certainly not alone. A logical question arises: were you able to get your money back, or at least a portion of it, for the poor installation? In the future, I would recommend searching for contractors more systematically, for example through https://windowsdoorspro.ca/windows-101/ , where you can understand the installation nuances in advance and understand what to look for. When I selected contractors through this resource, it became easier to distinguish the professionals from those who just talk nicely. Ultimately, the work was done competently, the house became noticeably warmer, and the cost of the services was commensurate with the results.