Rate my Series 7 singles team!

Question

OK, this is the first competitive singles team I have built. It has a name that definitely doesn't fit though...
The Winning Team!
Pheromosa @ Focus Sash
Ability: Beast Boost
Shiny: Yes
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Close Combat
- U-turn
- Poison Jab
- Triple Axel

Cinderace-Gmax @ Life Orb
Ability: Libero
Shiny: Yes
Gigantamax: Yes
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Pyro Ball
- High Jump Kick
- Sucker Punch
- Bounce

Urshifu-Rapid-Strike-Gmax @ Choice Band
Ability: Unseen Fist
Shiny: Yes
Gigantamax: Yes
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Surging Strikes
- Close Combat
- Aerial Ace
- U-turn

Regieleki @ Light Clay
Ability: Transistor
Shiny: Yes
EVs: 172 Def / 252 SpA / 84 Spe
Timid Nature
- Thunder Cage
- Volt Switch
- Reflect
- Light Screen

Dragapult @ Choice Scarf
Ability: Infiltrator
Shiny: Yes
EVs: 4 HP / 252 Atk / 252 Spe
Naive Nature
- Dragon Darts
- Phantom Force
- Fire Blast
- Steel Wing

Rotom-Wash @ Sitrus Berry
Ability: Levitate
Shiny: Yes
EVs: 252 HP / 252 Def / 4 Spe
Bold Nature
- Hydro Pump
- Thunderbolt
- Volt Switch
- Will-O-Wisp
https://pokepast.es/eafc5cb5ee9930e6
Once again, this is a hyper offense team because as some of you know, I always try to go for the OHKOs. Regieleki is a wall-setter, Wash Rotom is a defensive pivot, Pheromosa is a counter for Landorus, and the rest are sweepers. I am not confident in this team whatsoever as I seem to lose with it all the time on Showdown! Please give some advice, it would be really appreciated! Any advice to do with singles competitive would also be helpful. I am pretty useless at competitive Pokemon not just with building teams, but using them as well.

Comments

Wait but what format is this

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'Series 7' indicates BSS I think, since Smogon formats don't use the series for anything.

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The format is Battle Stadium Singles Series 7 in Sw/Sh.

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Ok just wondering the post says first competiteve singles team and so I figured it'd be a seperate format

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Anyway time for some comments. I don't feel like Phermosa is needed on the team since Rotom-Wash already cripples Landorus-T with burn and can strike back with hydro pump. Also if you really want a three pokemon sweep you should consider setting up.

Here's what I would recommend:
Lando-T over Urshifu-Rapid. I don't really like the repeat typing(PossiblySomeone, a person who has two dragons on his team). Lando-T runs a nasty swords dance set:
Landorus-Therian @ Sitrus Berry
Ability: Intimidate
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
-Earthquake
-U-Turn
-Fly
-Swords Dance

Cinderace is fine since Libero giving everything a 1.5x boost is honestly good enough.

Dragapult should run sash and dragon dance over Fire Blast.

Hm yes, time to be a hypocrite and recommend a repeat typing in Mimikyu. No good hyper offense team is complete without a cleaner and there's honestly no pokemon better than Mimikyu. The set:
Mimikyu @ Spell Tag
EVs: 4 HP/ 252 Atk / 252 Spe
Jolly Nature
-Shadow Sneak
-Play Rough
-Swords Dance
-Phantom Force

If you really want to devote into BSS you should consider getting a smogon account since they have some really good players, seeing as how they're the community that runs showdown.