Listen dud
The sore thumb you posted lost track of two things winning the RC - the first time ever in a WC year - and winning the WC by demolishing the favored English team. Meyer's away record was better than what? That is a joke in bad taste, losing or drawing against Argentina playiong away - or beating them by narrow margins were not having a better record.
Your calculations and percentages are jokes as well. After the destruction caused by Meyer and Coetzee Erasmus inherited a dispirited and lost group of players, He had to rebuild their self-confidence and find replacements to fill gaps in what was ultimately the WC squad of 2019. He experimented with a lot of players in 2018 in tests he did used as trials, eg -
* the Washington test against Wales - where only five usual test players were used; and
* the 3rd English test in June 2018 after the series was won,
He even used the dud in thinking Esterhuizen in some games and that says a lot, He also succeeded in beating New Zealand away - something never achieved by Meyer. He was clever and send the main team members to New Zealand and used some returnees to beat the Aussies by a huge margin in 2019 in SA, In 2019 the team drew with New Zealand and beat the Argentinians easily in Argentina - something Meyer never achieved, ,
However - in all the games lost by Erasmus the losses were against top-rated teams and not like Meyer's and Coetzee's specials = losses against Japan and Italy away and Argentina at home. Meyer's success is largely due to the fact that there were no rated teams in the June 2013 at home tests - the games were against Italy, Samoa and Scotland and for evaluation purposes representing a joke.
I pointed out to years which could be compared statistically on a realistic basis - namely 2012 and 2018, as well as 2015 and 2019. In both cases Meyer failed badly - eg scoring of tries and winning of trophies. For the rest there is no comparisons that could statistically be used to evaluate performances as coaches,
In any event - Erasmus is world wide accepted as the top coach in the world and Erasmus and Coetzee were fired by their clubs for gross incompetence. You still have not explained to us how a failure of coaching on Club level can result in them being successful test coaches on international level. If you can provide a reasonable explanation for that anomaly one can look at your explanation as to what happened more deeply.
The main problem with Meyer from the start was his teams elections - he was totally clueless as to that component of his duties, The end result was a classic - going to the WC in 2015 with a squad containing 8 unusable players, The result after the Japan disaster was that he had to use the usable players in all the subsequent tests and by the end of the WC they were exhausted and poor, Erasmus rested most players and only use the key players in crucial matches in the WC or had them on the bench. Meyer selected players on reputation - Erasmus based his selection on proven performance, Huge difference that one - bearing ion mind that Meyer was given a virtually unlimited budget by Stade Francais to recruit players and ended up with rubbish he should never have contracted,
In the meantime I leave it to you and Mozart to come up with the rubbish you always spout on site,