I come from very close to the place where Unlimited Wrestling promoted, I can also personally only advise against working with this dubious league. The league was finally created by a German Youtuber with a little too much money, who thought he could improve EURO-Wrestling only through his mediocre Youtube reach. There have been many negative voices about this league, be it from fans or even wrestlers who competed there (even before the Marty Scurll thing), from unheated locations in winter at minus degrees to salaries paid much too late. The league also praised itself for having "the most beautiful title belt in the world" and then presented a generic 0815 title.
And to top it all off, Marty Scurll is now even being protected in social media with the argument "you would never have listened to his side".