It seems like people are forced to enter these awful trades due to the margin requirements being too high. Margin requirements are designed to protect the brokers and not the customers. So that means customers have to enter bad trade likes iron condors that generate huge commissions for brokers
99% of the time, an iron condor, if it fails, will expire above one of the legs ,meaning you lose the maximum amount and be worse-off than if you sold a strangle or straddle. Only a tiny fraction of the time will having one of the legs actually save you money vs. a strangle or straddle.
I'm talking about index futures, commodities, and very liquid stocks, not smaller stuff
The commissions are the real P&L killer though
Commisions did kill, especially if you trade IC blindly - e.g. you trade IC routinely or mechanically each month without looking at the market context such as volatility. In long term you net P/L will be zero but you loss as you pay commission on top of those zero PL.