Quote from gillmiller»
I am doing crossfit these days and feel dead after every single training
I know what you are talking about. Maybe you need to take a week off from lifting. Rest days are necessary. They will allow your muscles, nerves, bones, and connective tissue time to rebuild after being broken down due to your efforts at the gym. Moreover, I noticed that I don't lose enthusiasm when taking breaks. Here is a good article on the topic https://betterme.world/articles/taking-a-week-off-from-lifting/ Maybe you will find it useful.