Mr Gill was talking with Vaughan Roderick on BBC Radio Wales' Sunday Supplement
UKIP has no future and may fold if the proper Brexit deal is done, the party's former leader in Wales has stated.
MEP Nathan Gill stated the party "could have been amazing" in Wales however had achieved nothingas a consequence of inside rows.
Mr Gill, who give up the meeting after infighting, stated if Brexit was done correctly UKIP can be "dead".
UKIP Wales has been requested to remark.
Mr Gill's feedback come after former Tory MP Neil Hamilton was ousted as leader of UKIP's meeting group on Thursday, and changed by AM Caroline Jones.
Mr Gill, who give up his meeting job in January amid stress about "double-jobbing" as an AM and MEP, stated there was no future for UKIP if the UK Conservative authorities delivered the proper Brexit deal.
He advised BBC Radio Wales' Sunday Supplement: "It is all as much as the Tories...if they fail to ship that, UKIP can revive from the ashes, however they'll kill us lifeless by delivering a good, stable, respectable Brexit.
"I might very a lot choose that we did what we stated we had been all the time going to do, get us a Brexit after which stroll off stage.
"If we absolutely get the Brexit that we've always been promised, and that we fought for, then I fail to see what we would exist for."
Mr Gill was himself ousted by Mr Hamilton from his function as UKIP Wales leader shortly after the party gained its first seats within the meeting in 2016.
The party initially had seven AMs, but it surely now has 5 after a sequence of rowswith Tory Mark Reckless leaving the UKIP group to take a seat with the Conservatives in Cardiff Bay.
On Thursday, Mr Hamilton was dramatically changed because the group's leader within the meeting by Ms Jones.
Mr Hamilton stated it was an "ambush" and he was advised of his sacking by textual content however Ms Jones had stated the choice was "amicable".
Mr Gill stated the party had wasted alternatives to have interaction with the citizens.
"We could have built a very strong party here in Wales, but it was a missed opportunity for very selfish reasons," he stated.