"Why do so many startups focused in the above four areas generally flounder?"
A "flounder" is a fish! She means "founder", which is a verb which roughly means "sink".
A "flounder" is a fish! She means "founder", which is a verb which roughly means "sink".
(intransitive) To act clumsily or confused; to struggle or be flustered.
"He gave a good speech, but floundered when audience
members asked questions he could not answer well."