Appears to exhibit selection bias - what if there is a disproportionately large number of single-founder companies, which fail at a much higher rate than those with 2 or more?
The numbers are interesting, but very misleading. It still doesn't answer whether it's statistically wise to invest in a single-founder company, or help a founder decide how many cofounders they should try to get onboard.
If the strongest conclusion possible here is "Hey there's still hope" then we didn't need all these charts for that sentiment.