I spent over 750g on my paladin quest mount
They’re unremarkable because you didn’t accomplish anything to earn them. You can get the best mount in the game with WOW Classic TBC Gold credit cards, or dedicate a large portion on the road to another one that’s recolored. You should invest your time and effort into obtaining store mounts. They will require more effort that you’ll get, however they are worth it.
I spent over 750g on my paladin quest mount. I prefer the Deluxe Edition mount when I’m riding on the ground. This could apply to you. But even on the retail side, most people don’t purchase achievement mounts for that long because not many of them actually look good.
Imagine you’ve been working at farming ICC for several years to attain the status of Invincible. This is a similar level for buy WOW TBC Classic Gold effort (because time invested) to earn an eight-level reward. There’s less of a gap between effort and reward but there’s more effort to earn a less valued reward. To obtain the most desirable mount, you don’t have to click as often as you can in the shop.