I've only had a couple of issues with PayPal, and this was back in the 2009-2011 era, where the service was still recovering from major fraud issues and attempted denial of service attacks. Had no major issues with PayPal itself, since then. Granted there will always be someone who will attempt to use the service to go after others, as it is bound to happen with any money related service.
I had at one time, was thinking of moving to an another service, but never jumped on the bandwagon of early users of other services, so I too would like to know potential services that are like paypal, but not tied to paypal itself, as a subsidiary.