Also if you're going by complaints just ask yourself - when have you submitted anything to Trustpilot on good service? Have you looked at the other providers also (eg - your old one? https://nz.trustpilot.com/review/orcon.net.nz). You'll note every provider has bad ratings on Facebook / Trustpilot. Everyone has different experiences but generally my experience with Orcon is terrible while my experience (with a few niggles) has been generally positive with 2degrees.
ISP's generally have bad ratings on Trustpilot because people would rather rate them badly even though an issue is potentially caused by something on their end and not even related to the ISP in question.
Lastly, Facebook is terrible here as people only really complain on providers pages. It is not indicative on general service at all because there is the other side of it where page owners have control of content including negative comments and often remove these.