And what is your team mate doing? Spamming caches?
Getting suppressed, sniped, mortared, shot by cons etc. The theory is not that maxim spam is literally unbeatable in a 2v2, but rather that it is unreasonably effective. Having 4x maxims on one side of the map supported by indirect fire and core infantry squads is very, very strong and there is no simple counter to it. You're making out in this thread like it's so easy to deal with but that is ignoring the reality of the 2v2. Even 1 con or guard squad in support of the maxims will significantly deter scout cars from closing the gap, and maxims themselves are NOT slouches when dealing damage to a scout car. Meanwhile the other side of the map is still contested by Player 2 as well. If you decide to abandon one side to focus on the other and hopefully beat them off, on some maps that means the Maxim player can then press up and cut you off totally. If it's a small map to begin with this can be very, very brutal.