I'm not the GP; I'm a separate person who was providing potential context.

Something can be a huge problem and still be small potatoes to people having catastrophic problems, and often those of us in very, very dire circumstances are tone policed to within an inch of our lives and have to constantly consider normal people above ourselves (and make no mistake, people with MDD are closer to normal than somebody with ALS or severe cancer). We're never allowed to express anger, never allowed to talk about having it harder, have to stop and attend to the feelings of others while ours are ignored, etc.

Also, no offense, but depression can end up making people very self-centered. It's your illness that makes you think that what you're going through is more important and worse than what anyone else is going through, and it's not. (And it's not for me either: there are definitely people who have it worse than me and could say they wish their problem was 'just' MS. I just wouldn't get offended by that.)