giving people needles and drugs is called harm reduction for a reason - it's to reduce the risk of dirty needles and street drugs, these policies don't solve drug addiction, they just keep drug addicts safe(r). Solving drug addiction is actually a tremendously hard problem but it starts with helping rather than punishing addicts. Portugal is a good example of doing this right: drugs are broadly decriminalised and the government provides help to addicts. Here's an article on drug policies across Europe (and some other countries): https://www.foundationswellness.net/drug-abuse/do-other-coun...
Portugal: https://deserthopetreatment.com/addiction-guide/drug-industr...