Personally speaking, you should use whichever team you feel more comfortable with. If that;s Team 1, great! Use it! IF it's team 2, great! Use it!
I like your first team more than I like the team that the veterans helped you build. It has a lot of coverage and probably, like you said, has a good flow to it after you use it for a few rounds.
The veterans team, however, doesn't seem (to me) like it would work very well. Without looking at it too much, I can already tell that it's made out of some of the most common competitively used Pokemon. Alone, they are good Pokemon, but together on a team? they won't work so well. It's not a well-balanced team; one reason being half the team would go down to a good fire-type, one being a Mega Camerupt. It doesn't seem like veterans helped you make it, it looks more like someone was on YouTube and that person sent you a list of some of the 6 most used competitive Pokemon.
SO (I'm ranting at this point) I'd say use team one, especially if you like it more than the second. (It's nice that it gets more wins too )
Edit: For help with your first team, look at the Three-Legged Pirate's comment, he's got good points