Is it common knowledge that Marcus Tregoning "told" Hamdan to sell Makfi or is that just an assumption because he was the listed trainer before the horse was sold?

The horse didn't have a 2YO career as it never ever ran at 2 or for Tregoning at any stage and was sent to an end of season auction sale with around 70 odd other Hamdan horses, where I doubt Tregoning made those decisions and was possibly made between the owner and his racing managers and if Makfi never ran as a 2YO then there will obviously have been a reason for that.

There's also a big difference between a smallish owner getting rid of a future star where if they only own a handful it should really stand out and an owner like Hamdan doing so with the number of decent horses he has spread all over with various different trainers.

Tregoning has done as well as can be expected and maybe even surpassed that considering he only really had one very high profile owner and I wonder if many criticising are even aware of the number of big races he has won and might actually be surprised by it. This list doesn't look too shabby to me anyway:

A Derby, Dewhurst, Gran Premio Del Jockey Club, Prince of Wales´s Stakes, Juddmonte International, Dubai Sheema Classic, Dubai Champion Stakes and a total of around 45 group races in all.