Why can't I win with this perfect team?

I start with Ceruledge and Armarouge. Ceruledge knows Shadow Claw, Iron Head, Solar Blade, and Bitter Blade, has a Fire terra-type, Flash Fire ability, and holds a Muscle Band. Armarouge knows Solar Beam, Sunny Day, Armor Cannon, and Lava Plume, has a Grass terra-type, Weak Armor ability, and holds a Heat Rock. On the first turn, I use a random Ceruledge attack and Sunny Day with Armarouge. After that, it is consistent Lava Plume and Bitter Blade. This hits all Pokémon on the field, but Flash Fire instead powers my Ceruldge's fire power up. With the Sunny Day in play, along with the Muscle Band, Bitter Blade is doing huge amounts of damage. My Armarouge is slower than my Ceruledge, however, when hit with a physical attack, Weak Armor make Armarouge faster, usually faster than all other Pokémon. Plus, if my opponant has many water-types, I can Terrastylize my Armorouge and use Solar Beam, which now only takes one turn to charge. I can use Solar Blade with Ceruledge as well, and, although not grass-type, Ceruledge will do a whole lot of damage thanks to Muscle Band. Once Ceruledge dies (it usually dies first) I send out Dachsbun. It knows Dig, Play Rough, Crunch, and Body Press, has a Fairy terra-type (considering changing it), Well-Baked Body ability, and holds a Quick Claw. With Dachsbun being slower than Armarouge (unless Quick Claw kicks in), I keep using Lava Plume, increasing Dachsbun's defense, powering up Body Press. I use the Quick Claw because Dachsbun is normally slower than the majority of the Pokémon in play, so it sometimes gives me an unexpected advantage. The last Pokémon I use is random. I switch between Quaquavaul (Aqua Step, Ice Spinner, Brave Bird, Air Slash, holds a Crystal Necklace, Moxie ability, and has an Ice terra-type), Meowscarada (Flower Trick, Night Slash, Play Rough, Acrobatics, holds a berry that increases my speed in a pinch, has it's Hidden Ability, and a Fairy terra-type), and Hawlucha (Feather Dance, Flying Press, High Jump Kick, Sky Attack, holds an item that let's you use a two-turn move in one move but only once, an ability that increases it's speed after using it's item, and has a Fighting terra-type). I usually use Hawlucha just because it is extremely strong and the item lets me immediately use Sky Attack, then because I used the item I get a speed increase, usually going first and getting quick, massive damage in. I sometimes use the others, though, when they seem like the opposing team has multiple Pokémon that will be disadvantaged to them. The first three Pokémon go extremely well together, and work just fine on their own. But every fight I get in, I usually lose! Why? What can be done better?