To be fair, a lot of people miss that Bootstrap is themeable, and what you are complaining about is just the default theme. E.g. check out https://bootswatch.c

To be fair, a lot of people miss that Bootstrap is themeable, and what you are complaining about is just the default theme. E.g. check out https://bootswatch.com https://bootswatch.com for examples, many aren't flatsville. I've had confused conversations with UX, etc over the years when they say "We can't use Bootstrap - our colors are totally different!", etc.