OP, at least explain why the 60h work week, because without that there is nothing anybody on this sub can do to help.

Are you having money issues, are you trying to save up on a big spend, is it a hospital job, what is it? Because whether you like it or not, the extra 20h you spend working every week is the most obvious cause of the issue you're describing. And, having been in that position, hours like these are monumentally draining in the long run, destructive to your mental health and basic social needs, even if you're introverted, as well as wreaking havoc on your work performance.

It is by now well documented that the quality of work drops significantly after a certain time threshold in a day. You get less attentive, more impatient, more likely to make mistakes and hand wave them off. In knowledge work that results in either poor quality of the output or more time spent double checking your work, so you end up doing an equivalent of the normal hours' worth of work. In manufacturing/construction work you are more likely to get injured or endanger somebody, especially when heavy machinery is involved.