Even non-framework people make frameworks. Just implicitly. At least a marginally good “real” one probably had somebody think hard about it and a great one has a community around it with plenty of devs that can jump right in on your project. All of them will have better documentation and you can get questions answered on stackoverflow. No such luck with the ivory tower anti-framework bozo’s pet framework.
God I’ve worked for too many startups where some “anti-framework” bozo declared frameworks as unneeded bloat.
Avoid these startups at all cost cause whoever hired the anti framework bozo is also a bozo and whoever hired that bozo is also a bozo. Fish rots from the top.
Not a good look for a startup with more important things to do than pushing far-out technology agendas.