Yes, Corsair items are not that good. I own a lot of almost all kinds of Corsair items. All of corsair items are overpriced. I have some 5000D series. 5000D is cheap, but I don't like them at all. The worst items are Headset, Mouse and Keyboard.Yeah some of it is down to product lines. Their high end RAM as far as I know, is not even really well binned for the price. Pretty much paying extra for average ram for looks/RGB with the “Dominator” series, much better alternatives out there if you actually want better timings/dies. Haven’t owned their mice or keyboards but their fans and pumps I have and ran into consistent QC issues…sometimes cosmetic, sometimes functional. I bought a GPU waterblock for my 4090 which wasn’t even milled to fit the extra VRMs vs standard variant though box claimed they supported the MSI Suprim… Their fan kits were all over the place with half the fans making differing noises at various frequencies… ML / AR series… Noctua NF-A series is much better for balance between noise/performance/consistency. Corsair overall seems like Razer back in the day in some ways; excellent marketing vs so-so quality.. Their PSUs mostly third party like Seasonic (couple models years ago), CWT etc not bad. Their cases aren’t bad either, at least for me, I really like the 4&5000D Airflow series.
Keyboard: Impossible to change switches without soldering. Switch and body noise. Garbage iCUE.
Mouse: Stupid shell. Poor build quality. Never heard of Chinese $10 mouse is better. Garbage iCUE.
Headset: Poor sound quality. Garbage fake virtual 7.1 ch. Are you kidding me Dolby Atmos for gaming? Garbage iCUE.
Mouse pad: Just ok but overpriced. Much better than ASUS ROG Garbage Mouse Pads.
BUT I can say Corsair iCUE is way better than ASUS Garbage Armoury Crate.