[RATE MY TEAM] I Need Help With My Team

[Rogue]

This looks more like a singles team than doubles. The two play very differently. I also would need to know your items to help you a little bit more: But here's my general idea of what you should change and do.

Galvantula @ Focus Sash
Ability: Compound Eyes
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Thunder
- Bug Buzz
- Hidden Power [Ice]
- Protect

Galvantula is rather frail and get OHKO'd by most things in the meta, so I think it's best to toss a sash on it. I get what your idea is on hazards with sticky web: But Pokemon in VGC usually don't switch that much, so you'd be wasting a turn for a hazard that might not even come into play. The speed control with t-wave would be nice, but it's easy for Galvantula to not even live even 2 turns.

Goodra @ Expert Belt
Ability: Gooey
Level: 50
EVs: 92 HP / 164 Def / 188 SpA / 4 SpD / 60 Spe
Modest Nature
- Ice Beam
- Fire Blast
- Dragon Pulse
- Sludge Bomb

I've never uses Goodra myself, but I know many who have. This is your common e-belt build, which gives you an offensive/relatively bulky goodra with decent bulk.
Rain dance requires set up and it's sort of a waste if you go up against other weather teams, especially when the only water type you have barely benefits from rain. Politoed would be a better choice if you wanted a rain team.

Machamp @ Assault Vest
Ability: No Guard
EVs: 252 HP / 156 Atk / 100 Def
Adamant Nature
- Dynamic Punch
- Ice Punch
- Stone Edge
- Knock Off

Mixed feelings about machamp. Conkeldurr is usually just better in every way. However. It's nice that he can never miss dynamic punch or stone edge. But he also is hit by all moves 100% of the time; meaning he's easy to get burned. Might wanna consider lum berry? I used assault vest out of not using him much.

Mawile @ Mawilite
Ability: Intimidate
EVs: 252 HP / 100 Atk / 44 Def / 112 SpD
Adamant Nature
- Iron Head
- Play Rough
- Sucker Punch
- Protect

Standard bulky offensive Mawile. herp.

Delphox @ Life Orb
Ability: Magician
EVs: 12 HP / 252 SpA / 244 Spe
Timid Nature
- Overheat
- Psychic
- Protect
- Role Play

I really would consider trying out overheat. It does big damage + can even OHKO things like shield Aegislash. which is huge. I like the role play choice however. Could be interesting. Might wanna drop magician for blaze however, considering offensive delphox does more for your team.

Vaporeon @ Sitrus Berry
Ability: Water Absorb
EVs: 140 HP / 116 Def / 250 SpA / 4 SpD
Modest Nature
- Muddy Water
- Hidden Power [Grass]
- Ice Beam
- Protect

rip vaporeon, you're somewhat missed. This was a big set back in the day, and it was probably one of the best so I'll slap it here. I get what you're wanting to do; Helping hand for support + aqua ring for survivability: But those require set ups which you don't have time for in doubles. Not to mention not having something like protect in VGC can REALLY cost you a game. Bulky offensive vaporeon.