My comments were not a knock on Red Line. I used their products on and off and my only negative experience was with their 5W-30 burning nearly a quart of oil out of six in my 2017 Hyundai 3.3L GDI engine at 6800 miles. I don't know why that happened, and I haven't tried to reproduce that since then. Currently running Mobil 1 FS 0W-40 in it without issues.
Red Line D6 ATF provided firmer shifts for my vehicles than I liked, same as AMSOIL ATL (most likely they both use the same DI package). Other than that, I never had any issues with Red Line Oil. It's good oil, and the fact that Red Line uses POE in just about everything they blend is a plus. I also like that they publish (or provide via email) details such as flash point, pour point, MRV, and NOACK. And by God, the new formulations have brought down NOACK to some unbelievable levels. I am actually considering using them again.