My computer couldn't even handle training with bots, but I dug around on websites and looked for a suitable map so my computer could handle it, stumbled upon the Dragon Project, they have 2 servers: 1. This is a map with an FPS boost on which my computer reached an FPS mark of 150!; 2. This is a regular Mirage for those who have a really powerful computer.
Thanks to this project, it became more comfortable for me to play Counter-Strike 2