Pick one queue
Start with one game mode, role, or loadout. A long match and a short match count equally in a win-rate sample, but their damage totals may need separate review.
Use total counts
Add the wins and matches first, then divide. Averaging two daily percentages gives too much weight to the shorter session.
Use streaks as scenarios
The required-wins calculator answers how many straight wins would move your current record to a target. To assess improvement, compare samples from similarly sized blocks of games.