Theres a few optimizations you can make but you might be bumping up against your device/area's capabilities.
The orbi's aren't going to be the fastest devices out there because they're a mesh system. They're designed for higher average throughput over the whole home. You'd see faster peaks on a single router flagship solution. But it'd be slower at distances.
A couple things.
1. home size. How big is your home and how many satellites do you have?
2. What is your home made of on the interior? certain materials block wifi better than others.
3. How far apart is the satellites from the router/each other? 30ft is the minimum distance they need
4. have you tried changing wireless channels on the 2.4ghz? There could be interfrence and 2.4ghz is much more sensitive to interfrence.
5. 2.4ghz is slow. Its baseline isn't fast if you live in an area with congestions (apartment, condo, townhome, houses close to each other)
6. What speeds do you get hardwired into the router and then satellites? it lets you check the backhaul speed.
