I’ve sent roughly 30% of my stuff back including a frame, a fork, Fox knee pads, Funn seatpost, Azonic jockey wheels, Tenn waterproof shorts and a Mavic wheel with play in the hub from new.
Mainly manufacturing faults/cost reduced design choices and retailers (CRC) taking the piss sending out damaged customer returns.
External Shimano bottom brackets last about a year and fail with a dry seized bearing on the non-drive side. Correctly torqued in 3 different frames.
Most tyres across several brands (except Bontrager thus far) seem to buckle with ease within the first few rides IME. Might be my riding style that’s to blame, I’m no Kelly Mcgarry! nor do I run XC tyres or pressures below 22 psi.
On the other hand some of my gear has performed better than expected and has proved to be good quality for the money.