Speaking of intense matches, once in BFII when I played Galactic Conquest and tried to invade Geonosis as the Clone Army we got completely annihilated and in the aftermath there was just me and one heavy trooper. The droids had gotten substantial losses too, but they were still more than us and also had the support of local geonosians. Things looked grim as I ordered the heavy tropper to stay with me in the lookout tower and try to hold our ground. I don't remember what class I was before, but I had changed to the Engineer in order to support my squadmate.
Thankfully, it's always darkest before dawn, and just when things looked really dark an AT-TE were dropped. We carefully made our way to the AT-TE and entered it (thankfully this wasn't the first game, where the AI just jumps out of the vehicles once the ticket drop to around 20 or so,even while in the air). With the AT-TE we managed to take out the rest of droids, and oh man was that intense.
Those were definitely the worst things about the campaign, and whoever came up with those should be thrown into a Sarlacc pit.