There is an old adage about loving people which is that I love YOU but I don’t love YOUR behaviour. I think it is really important to seperate the two things out.
You have a problem behaviour that causes you to gamble – but YOU are NOT just your behaviour. Love and support the YOU that is making changes, getting support, blocking yourself from gambling. That shows that you value YOU.
So please don’t hate yourself. Hate the problem behaviour. You need to love and support yourself through this. Give yourself treats, be gentle with yourself – what is done is in the past, leave it there and move forwards into a new part of your life as a recovering gambler – and soon to be a non-gambler. Love yourself for that – not for past behaviours. I wish you well.