Keep Getting Camping Teams?

So I'm super confused as to why every match in Arena I'm with three people who at the beginning of the match within the first 2 minutes are all super negative while I go positive clearing the way and telling them to push out of our spawn because the other team is two down but they won't do it. What is the phenomenon that is happening on this game right now? I want to sit down with these people and ask them why they search ranked Arena..full interview. 2-7, 4-7, 3-8 within the first 2 minutes hiding in our back flag.. I'm like guys push out of our spawn! And they won't do it even though I have cleared the way and the other team is not putting that much pressure on us yet but they continue to move around our back flag. WHY. this isn't just one game this is happening, this is probably 90% of my matches. I quit at 7-8 because every time I had the other team pinned down and nobody was moving a foot past our flag, JUST CROUCHING IN CORNERS. Theatre mode proves it. This is not on me, the people who play Arena have no idea what they're doing, it reminds me of playing social Slayer on Halo 3. It's Insanity!