Try the discord server:
https://discord.gg/ybXwdUZPy
Most guilds I join might have 2 or 3 TW 0s at most. I did recently join a guild just going off their GP without really checking stats, and they had like 14 0s, which was mind boggling. They were getting at least 7-10 fewer stars in ROTE than the average guild of their GP too.
So that's why I'd recommend checking any prospective guild out on swgoh.gg first. Look at their TB stars, TW win rate, raid box, GP-to-GAC League correlation, datacrons, GL and ship numbers per GP, etc. to get a sense of how serious the average player in their guild is.