You do need to give it a chance. It's so hard to leave your baby for the first time and his reaction is of course upsetting. But he will very likely get used to it and come around. How old is he?
While the way she put it was pretty shit, @LemonJuiceFromConcentrate has the germ of a point in there - you have to be able to let your son feel his feelings, maintain perspective, and not make him responsible for yours. Right now he's (I presume) very little and won't be picking up on this, but the idea you would make a major life decision based on a temporary acting up on his part is concerning, it gives him too much power and power is very scary for little people who need to know their parents are in control, have firm and sensible boundaries, and can contain their children's sometimes overwhelming emotions while they learn to understand and control them. That's part of our work as parents, to give them that sense of safety. I was parentified by my mum from a young age and it was bloody scary. I'm sure you're just upset and venting now, but it's worth bearing in mind going forward. I hope he gets used to your new routine and you get your cuddle soon x
Btw when my daughter started nursery she used to be happy all day, until I came to pick her up, then the second she clapped eyes on me she'd burst into tears. For months. Hard not to take it personally! But she was just overwhelmed by a lot of big feelings and reacting to that. Your son will be doing the same. Be calm, be consistent, and keep showing him that no matter how often you go away you always come back and are there for him.
He absolutely, categorically does not hate you. Some parents absolutely batter their kids and the kids still love them. That love is not at all fragile, and won't be undone by a few long days at work. You are his world.