You have to remember, gender dysphoria is a (rather severe) mental disorder. Some evidence suggests it's due to their mom having a hormonal imbalance or abusing substances while pregnant. There's no known permanent cure, HRT is the only thing that seems to help, and even then, it only helps half of the troons, for a variety of reasons, mostly being too mentally weak to realize some people base referring to others on sex instead of (attempted) appearance.
Female puberty can be one of the most terrifying experiences in a dysphoric FtM's life, as can male puberty for MtFs. Whereas, for most people without it, it really wasn't shitty at all.
Ultimately though, most Tumblr users are some creed of insane. And most troons on there don't even have GD, getting HRT from the black market if at all, regretting it, then detrooning into an equally insane radical feminist or ally (making them look bad), or 41%ing.