Exactly. I have a 60 Mb cable connection, with HughesNet as my backup with a dual WAN router in failover mode. I just switched over to the HughesNet connection and this is what I get:
In contrast, this is what I get during the day
The latency is very noticeable with satellite, and I'm not much of a gamer, but not as bad as I thought I'd be. There is a noticeable delay when I connected to my work VPN and use VNC or RDP, but it works better than expected. Also the delay when giving commands to my Google Home is noticeable but not a killer.
To the OP, if you use 300 GB a month, stay away from satellite. You cannot use that amount of data. With DishNet, Dish acts as a reseller, they sell re-branded Exede and HughesNet services. Not sure how it's determined what service you get. This is from a retailer, not Dish directly, but here are the prices/speeds.
https://www.infinitydish.com/dishnet