Two stopper wasn't necessarily the wrong choice, just that he made the one stopper work fine but seeing as he's just generally faster than Bottas and significantly better on tire wear I wouldn't be certain that a one stop was the right choice for Bottas even if it was for Hamilton.
Bottas just isn't good on tire wear. I've said for a long while now but if Bottas can get ahead into the first corner at an Australia, Monaco, etc then sure he can win, and at super low deg tracks like Russia, again he can look good. Almost anywhere with real tire deg he's just not competitive. Even Toto called him out as tire wear being his next biggest flaw. If he wants to fight Ham he needs to basically study the hell out of Ham and work to change his driving style to get the same tire life, if he keeps doing the same thing over and over he's not going to get anywhere. COmpetitive in qualifying but can't match in race pace, remind you of any other of Ham's team mates