I remember this exact complaint from AoE2 players a while ago, because they didn’t understand that in team games it’s the whole team’s rating that counts, not each guy’s rating. It’s how it works there and how it works in AoE4 (same matchmaking system btw). Not sure for AoE3.
There is a definite problem with the levels of difficulty in AoE3 as ‘moderate’ is easy and ‘hard’ is impossible ! Surely there must be a level in between !