Yes i did clean the bed with alcohol before the print.
I have an update tho...
I let the printer finish the print of almost 24hours and it succeeded, the warping was really bad at the end but it sticked to maybe 1/4 of thr model.
And boy did it stick well on that part... It actually tore a peace of the coating of even after letting the ub cool down first.
So like Rumbalin said the ub is not the perfect solution for printing PETG couse it might damage your print bed.
Laying down a raft of pla or some bed surface protection is recommended.
I will flag this post as kind of solved.
Thank all of you for your replies and inputs!