You lose because there's close to no synergy among your 3 teams. Gnw battles aren't at all like single match battle and while one team is strong is not said at all that the same team used 3 times is as strong nor that if 1vs1 you can beat it that you c*so 3vs3.

Do you want to beat that triple mei mabui tenten gnw team? Go for synergies. Use a jinchuriki gnw team for example or a full tendo triple team or an heavy cc gnw team.

One han + one yagura just removes all the advantage that triple mei mabui tenten have before the first tenten gnw can even move.

Honestly speaking your enemies weren't even much smart. There was no need to use 3 1010 mei mabui lineups. Two gnw tenten hits are more than enough for round 1. If they were wise they would have used two of those teams and the third would have brought a supporting team like chojuro, ao and a 3rd supporting ninja with poison tai and neurotoxin. Two chojuro hits after the two tenten hits would wipe out anything that's left alive as much as a 3rd tenten hit but would have granted a sure chaos+poison combo for round 2 and ao would have prevented that hashirama barrier or a lightning armor.

They nerfed tobi and fire main because that team was too op, overall for the easiness of ninja availability that composed it. The chases were mostly unavoidable and linked together, moreover you had a round1 prompt chase starter and just incapacitating one ninja wasn't enough to prevent round1 obliteration. It is not even close to mei mabui tenten team that can be made useless easily by stealing chakra or blocking mabui and that also grants you the first action of the battle regardless the initiative you own because tenten gnw can be used only after mabui standard attack sequence began.

The reason why you all rant about that team is that you don't want to use bee samehada or kisame as midnight blade because they ruin your shining team, making it slightly weaker against other metas.

EDIT: i think i went a bit too much ahead, i say sorry, wasn't my intention to be too blunt.

Anyways, what i meant before is that one of you brings han and uses him and another one of you brings wb asuma and yagura and copy one of their mei. The result is that all their buffs are removed while you have mei barrier up. How you complete the 3 teams is up to you, of course, but there are many options that work well.