So just to be clear, the final result of the match was 2 - 1, and you betting on a draw would have won if it was 2 - 2.
Why are you expecting the VAR decision to not count though?
Bets are settled based on the final score. And if the league sets its final score based on VAR decisions, then there's little the bookie can do.
You can't realistically expect a bookie to not settle a bet at all just because VAR was involved. That would make a lot of other bettors unhappy.
You're right. I am assuming the match was already close to the end when he placed the bet and if so, the fact that the odds were 2.05 is enough reason to be suspicious of the situation of the game, another thing is live games are more volatile and more likely to go wrong because one is predicting a match based in the current situation which can change any time, and some matches can receive up to and sometimes more than 10mins of added time which is enough time for things to change in the game, unlike betting pregame which one is more likely to predict correctly because one can analyze based on current forms, injury forms and previous head2head meetings.
Staking such a huge amount is not advisable for live games, but can be beneficial in basketball games and not in football games. The booky knows this and expects you to be informed on the disadvantages of VAR in staking live games so they would not admit to any fault or void the game due to that.