These are what analysts of the Mahabharata have identified as corruptions/interpolations that appear as Bhriguisation.

Bhriguised parts are easy to identify, as the epics go off tangent in them and delve into stories of some Bhrigu hero, that fought Kshatriyas to varied results. https://twitter.com/sisodiya000/status/1381937968844169224

There is no dearth of Bhrigu Vs Kshatriya narratives that are retold in numerous ways but always from a Bhrigu PoV.

And often involve hyerboles that may include extermination of either of the races.

Often there is some kid that is left as he hides behind his mother, in the Vishnu Purana this happens with Aurva, who hid in the Uru (Thighs) of his mother to escape the wrath of a Haihaya King.

In the MBH.XII.L the Earth itself saves Kshatriyas of various races by hiding them.

Readers of the epics will also find that these elements that introduce Bhrigus into epics are not only repetitive, self-contradictory and inconsistent but also inconsequential. They have little to no effect on the overall progression of the epics.

Moreover these heroes like Parasurama are not found in older acknowledgements of these epics, especially when epigraphy is observed. The legends are also made up of several local folk tales of varying regional lore.

Take for example the formation of Kerala. Etymologically the name Kerala comes from Keralam, that comes from Cheralam of the land of the Cheras.

But this legend is contested by the Bhrigus who credit Parasuram as the founding father of the land of Kerala.

An legend from the composition called the 'Pattitupattu' of the 1st century Sangam poet Paranar, the Chera King Vel Kelu Kuttuvan drives away the sea by throwing his spear into it and claims the land of Kerala.

This hero is replaced by Parasurama in the Bhriguised version.

Again in the same work i.e. Pattitupattu, another subsidiary Chera king named Perum Cheral Irumporai defeats a shepherd/cowherd chief called Kaluvul.

It won't be surprising if this is the inspiration of the story of Parasurama's 'victory' over the Haihaya Yadavas.

Of course the Sangama texts (from 1st century) are older. Hence these Bhrigucentric appropriated and interpolated retellings that appear in hindu epics should be taken with a pinch of salt.

The region of southern soast between Gokarna to Kanyakumari is called Parasurama Ksetra.

The myth that Parasurama ruled this coastal zone between Gokarna and Kanyakumari as a King, also makes it more likely that Parasurama was based on a Chera ruler of Kerala and with time more lore and feats were added by the cult of the Bhrigus.

Hence, while it's justified to have a critical/skeptical/analytical approach while reading our great epics, it's not wise to reject them because of some motivated interpolations done by the Bhrigu cult.

We'll lose a lot, Mahabharata is just that - A Great Epic of the Bharatas.