No whatsapp and telegram

At present I don't have any WhatsApp and Telegram app in my this Samsung Z4 mobile phone. As they damaged the power input point of My Samsung J2 Core device, I could not recharge that device. Yesterday I logged in my elder brother's Redmi Note 7 mobile phone to upload my 3rd video into my you tube channel. Today uploading got completed. Now I want to remove my Google account from my elder brother's Redmi note 7 device. Because at any moment they may give command to my elder brother's or to my bhatija's brain to deactivate my Google Account. My bhatija was a well mannered and studious boy upto 2012. But from 2013/ 2014, they  controlled his brain and his mind and made him rude, disobedient and impulsive boy by giving ulta pulta command to his brain. So, I am worried about safety of my Google Account (including this blog and my you tube channel). Chrome and Redmi should immediately display log out/ sign out/ account removal button , so that I can remove my Google Account from my elder brother's Redmi note 7 device. In any case, Google Should not allow anybody to suspend/ deactivate/ delete my Google Account (including my this Blog and my you tube Channel)