B2/W2 - Competitive Team That Keeps Loosing :(

[HystericalPokeBall]

Hi PokeCommunity,
I have been playing competitive but I am not doing so good I keep loosing (Just Random Matchup so the tier is no problem)...
This is my team please tell me what is wrong/good about the team what moves should go etc.

Braviary a.k.a Liberty (He is shiny so America doesnt really fit)(Physical Sweeper):
Ability: Defiant (Love dem Mondays)
EV's: 252Atk/4Def/252Spe
Item: Choice Band
Nature: Adamant
Moveset: Return
U-Turn
Fly
Superpower

Eelektross a.k.a Voltaire (Physical Sweeper):
Ability: Levitate
EV's: 140Atk/244SpD/124Spe
Item: Scope Lens
Nature: Rash
Moveset: Gigadrain
Superpower
Thunderbolt
Flamethrower

Gallade a.k.a Excalibur (Physical Sweeper):
Ability: Steadfast
EV's: 252Atk/4SpD/252Spe
Item: Leftovers (When I get one xD)
Nature: Lonely
Moveset: Night Slash
Leaf Blade
Psycho Cut
Close Combat

Hydreigon a.k.a Cerberus (Special Sweeper):
Ability: Levitate
EV's: 252SpA/4Hp/252Spe
Item: Expert Belt
Nature: Rash
Moveset: Flamethrower
Dark Pulse
Draco Meteor
Earthquake

Seismitoad a.k.a Marinus (Tank):
Ability: Poison Touch
EV's: 252Hp/32Def/224SpD
Item: Leftovers
Nature: Lonely (I got him shiny)
Moveset: Drain Punch
Ice Punch
Surf
Earthquake

Reunicleus a.k.a Ectoplasm (Tank/Special Sweeper):
Ability: Magic Guard
EV's: 192Hp/64Def/252SpA
Item: Life Orb
Nature: Quiet
Moveset: Energy Ball
Focus Blast
Psychic
Shadow Ball

I just really dont get why I keep getting owned :(

Thanks alot,
HystericalPokeball

P.S: This is Gen 5 team for B2/W2 remember that!

 

[PlatinumDude]

Seismitoad is outclassed by a lot of things in OU. It's only good in rain teams. Gastrodon is the better alternative for its ability to check Water Pokemon:
-Earthquake/Earth Power
-Scald
-Toxic/Ice Beam
-Recover
Nature: Relaxed/Bold
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers
Ability: Storm Drain

or
-Surf
-Earth Power
-Ice Beam
-Recover
Nature: Modest
EVs: 172 HP/84 Def/252 SAtk
Item: Wise Glasses/Mystic Water/Splash Plate
Ability: Storm Drain

If you're using a Quiet nature on Reuniclus, use Trick Room:
-Trick Room
-Psychic/Psyshock
-Shadow Ball
-Focus Blast/Hidden Power (Fire)
Nature: Quiet
EVs: 192 HP/64 Def/252 SAtk
Item: Life Orb/Leftovers
Ability: Magic Guard

Fly is too easily played around on Braviary. Brave Bird is the better option:
-Return
-Brave Bird
-Superpower
-U-turn
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Choice Band/Choice Scarf
Ability: Defiant

Eelektross isn't worth using, IMO, despite its good move pool, because of its bad Speed. Wash Rotom is the better fit:
-Volt Switch
-Hydro Pump
-Will-o-Wisp
-Pain Split/Hidden Power (Ice)
Nature: Modest
EVs: 232 HP/56 SAtk/220 Spe
Item: Leftovers

or
-Volt Switch
-Hydro Pump
-Thunder Wave/Will-o-Wisp
-Pain Split
Nature: Calm
EVs: 248 HP/28 SAtk/232 SDef
Item: Leftovers

or
-Volt Switch
-Hydro Pump
-Hidden Power (Ice)
-Trick/Thunderbolt
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Specs/Choice Scarf

Gallade isn't that good in OU because of its middling Speed; Lucario is the better option over it:
-Swords Dance
-Close Combat
-ExtremeSpeed
-Crunch/Ice Punch/Shadow Claw/Bullet Punch
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb