As mentioned in the other guides if you didn't won your 5 in a row when the streak is active and continue playing at the end you'll increase your ranking and you will find new opponents with a more competitive level making it even harder.
However, as you proceed, your chances to upgrade your pins will be higher.
So the strategy is this:
1. If you haven't won your streak in the early phase of your gameplay don't worry.
2. Focus in upgrade your squad.
3. Afterwards, lose matches in order to decrease your level for example -250 of your current rating (e.g. if you are at 900).
4. when the streak is available outrun your ¨paired¨ enemies.
Currently the game makes a matchmaking based on your 'Gears' amount and not the overall level of your squad, so use that as your advantage.