In my case, I also prefer 1x2 bets because it is an easier compare to predicting the exact score as the chances that we are going to hit the correct guess is pretty slim like 20% and below unlike to 1x2 bets that we have 50/50 percent of chances to win.
Predicting the score correctly is pretty difficult to do even the professional gamblers can't easily hit the correct score in every game so I can consider that your prediction is already a good one for a normal gamblers, 5 correct guess out of 78 matches.
That is just a lottery for me and the possibility might be higher than lottery but still, you can't predict the future. There could be multiple overtime although its rare, it could happen. In my case, I guess guessing from 78 games, it would take me 20 to hit 1 so thats like 3 out of 78.