A STUDY becomes valid, reliable etc. when it reaches as many clients as possible. This is regardless of whether the experience is positive/negative. My guess with you is rather to make displeasure big....

Yes, I ordered a colour laser printer last week and additional colour cartridges. Unfortunately, one colour cartridge was outstanding, which didn't bother me as it was supposed to be ready for delivery in two days. Now I get a message that the colour laser printer I ordered is not available until August! When I ordered it, it was shown as 100% available for delivery the next day! Unusable, I have cancelled everything.

No, I have no problems with the delivery dates. If it says delivery in 5 days, the goods also arrive in 5 days.