Well, the EOS R and RP are entry level cameras. They have yet to release a professional series mirrorless camera. Comparatively, the 1st gen Sony mirrorless systems were pretty bad. They had tiny bodies that overheated, had poor battery life, and had slow unreliable AF. Ofcource, The EOS R and RP won't be compared to Sony's 1st gen, which is very fair, but I don't think canon has failed in this market.
I'd say they haven't succeeded yet - and the signs aren't great. They needed to produce a knockout offering with the EOS R and RP I think - they were so far behind that unless they did, they would struggle to build market share. I don't know how many more chances the market will give them to get it right, sadly.
I disagree. Given their history and given their capability, I give them an excellent chance to hang on to their current dominant position. They're still producing drool worthy glass.. the RF 28-70 F/2.. the RF 50mm 1.2 is the tits. The new 600 F/4 III is sublime.