Recommendation: Start a 5-10 minute PVP shield when you step into PVP battle - a shorter version of the 3 hr loss shield. Especially at around the Legendary 4/3 ranking, I find myself on constant shield cooldown. When I break the shield to attack, I will more often than not lose a match in the time it took me to (best case scenario) win another match. And since you lose more points than you win, the net effect of a win is a 10-15 point loss and a reset of the big timer to 3 hours after you finish your battle. It can be maddening multiple times in a row.
Mods: feel free to lock this and cross reference other recent threads if necessary - although I haven’t seen any specifically this is a relatively common suggestion.