I am squatting more than I deadlift but yet after as little as 5 lifts of deads I feel tired. I can cruise on the bench all day and it takes over an hour to get tired, and nearly the same with the squat. What is going on?
For starters, bench is going to exhaust you less because less muscle is being used. This means it makes a smaller metabolic impact.
Also, if your deadlift is lower than your squat it isn't the end of the world, it just means you have a strength imbalance.
Deadlifts can exhaust you faster for many reasons. It could be form issues, it could be that you are under-recovering (because deadlifts take longer to recover from than other exercises), or a lack of muscular endurance.
To correct this I would suggest spending a bit more time on deadlifts than you were before. Increase the weight when you feel comfortable. Focus on what you are bad at, in this case, high rep sets. Do sets of 8. Keep plugging away and come back if you see no change.
My top three guesses:
You don't squat right. You go down to about 60 degrees and call it a rep. When you deadlift you are beyond the point where your squat ends.
You haven't done enough deadlifts. It will take a few months of doing a lift before your helper muscles adjust. A person never doing deadlifts can't just naturally deadlift more if they haven't done them. Some people may take a few weeks, some a few months.
You don't like doing them. Your attitude towards the lift decreases your adrenaline and you feel tired faster.