Not sure what to make of this?

Complaint letter seems to deal with three different events in reverse order?

Older one appears to be totally substance free. Stressful to make a connection after a flight gets delayed, come on? At the end of the day, it's more their problem than yours.

Luggage delayed at LHR? Welcome to the club. They got it to you. That is where an airline contractual obligation ends. Remainder is more or less whining. Surely they would have paid/your insurance would have paid for clothes changes. I would never pack a camera in checked luggage. As to glass stuff, surely it was not properly packaged? Again, I would have carried that.

Newest event. OK, again a delay. Means that they should have picked up your hotel bill and put you on the following day's flight. Compensation offered was appropriate, and more or less in line with what any airline might have offered.

What is either bad luck or odd in some other way is that you experienced three such events within a few weeks. Either real bad luck or maybe not really believeable?

Agreed that a code for a 10% discount is a pathetic thing to offer.

But my final comment: this is a textbook example on how *not to write* a complaint letter. Too much whining. "I am claiming fair compensation," OK, that is precisely what they gave. Fair compensation.

Anyway, my personal experience: out of 14 transatlantic flights this year, I never experienced more than maybe 30 minutes delay. OTOH, a relative who flew from BRU once was delayed for something like 15 hours. Bottom line: there is no guarantee and there never was, about schedule. If I imperatively have to be at a certain place at a certain time, I provide myself with a 24 hours margin.