I don't use the bots that often for 4-5 hours and they are on years old VM's but 2 of my accounts were banned today for 3 days

To mimic human you should have "days" and "nights" when bot does not work. During days setup "idle" delays for 0.5-2 hours. Add time randomization like 2-3 hours (timers 1-3) to avoid situation when bots start every day at the same hour. Best protection if you play your accounts manually, so bots do not run the same activity over and over. Abyss hunters used for bot farms and CCP look closer what your account used for. Especially valid for new alfa accounts and accounts used under VMs. If you contact me in telegram I will share more tips to avoid bans