I am using Paypal more than 3 years and never got problems, I'm sure Paypall not scam because it already has business units in many cities and countries, even we could withdraw our funds via bank account.
Not to mention the sheer number of online merchants who accept paypal as a payment method make it a credible service. Its also made by Elon Musk so you can definitely be at ease that Paypal is not a scam.