No don't share your loginID.
Ccleaner is a program that generally helps you keep your pc clean and. Eventually every system slows down due to a lot of crap being on your pc unnoticed.
Your specs don't seem too bad for Squad, so idk where the loading times come from. Preferably 16GB of DDR4 RAM is what you want for Squad, but tbh your amount works fine.
Try running the game, and only the game, nothing else. Disable virus scanner, firewall etc and see if that prevents you from getting kicked. It may sound risky, but as long as you don't do anything besides playing on a Squad server, it should be fine.
If you still get kicked, the only thing i can say is to back up your important stuff, and reinstall your windows.