I am sure I have mentioned this here before several times, but I am 6'6 and between 340-375# and have been riding a carbon Scott CR1-10 since 2016 and well over 10k miles with no issues. It replaced an aluminum Specialized that got stolen and the Scott is approximately 11 billion
percent stiffer and less "spindly" feeling under my weight. And it rides better/smoother.
Also, IMO, a 240# rider having that much wheel trouble is also not...great. The above mentioned Scott will barely fit most 25c tires or a wide running 23c. So I have to run high pressure so any bad roads or whatever get transmitted to the wheel and I have WAY fewer wheel problems than that. (You also have to ride "light", which I try to do but miss stuff like everybody) I had a Vuelta HD wheel last 3 seasons of heavy miles before going out of true and even my latest Velocity one that went out recently had 18 months on it and 2k miles.
HTH
DaveW