Helldivers 2

It's always been very difficult. It is possible to complete (I did one on Helldive with randoms a couple days ago), but you need to approach the mission in a very specific way. Have you noticed that the map is really large for a 15 minute mission? I think the extra space is there for a reason. If most of the team engages bots away from the main objective then the drops will be mostly off the main objective. One player can play ninja (Scout armor, smoke grenades/eagle/orbital) and run around pushing the buttons while the rest of the team draws heat from the main objective and kites around the reinforcements.

The other technique, which works when solo and may be better for duos, is to kite reinforcements away from the pad until aggro drops. Once it does you run back to the pad and push buttons as much as you can until you start to get overrun again. Then repeat. Edit: to be clear, even with a 4-man team it's likely that the button-pusher will start receiving drops at some point, in which case they'll need to kite off the pad too.

I still think the mission design is not good, mostly because it's not communicated to players that you have to approach the mission completely differently than any other mission type in the game. I have to imagine it's intentional though, why else make the map so large?