Her weight is an issue also.It is both.
I don’t think a size 14 is XL as per some brands and no one ever queries the weight of male riders
I don’t think RTG issue is her weight it is the complete apparent lack of awareness of her use of her hands/spurs
Horses and ponies have weight limits. It’s awful to see so many bigger people on ex racers. These horses are not built for that. No one dare say anything because you are large shaming!
Loose weight people to benefit your horse or get a horse that can carry your weight.
Unpopular opinion but a factual one.