You one of them people who have no luck with finding raids I was one of them now im finding bases like it takes me to chop wood with just these tactics.
Faction bases: Obviously do the command /f map on then scout around until you find claimed land and you check it out.
Unclaimed bases: Get F3 up and you look at the bit where it says “E:0/1 or whatever that’s what you call
entities you should be looking at the bit after the slash that means the entities you cannot see so it must be in the sky or underground. You may just find mineshafts or random mob caves but they could be for example “Spawners, Item frames, Cactus farm and etc so it’s worth checking. Also /f map, helps show faction bases.
Tactics: Either use the entities tactic or you can use some natural tactics.
Grass tactic: If you see loads of eaten grass it means someone is living around there because sheep freeze when a player is far away from it so it needs a player to be around there for a period of time for the sheep to start eating grass.
Noob polls: Some new players could create their base up in the sky and forget to break their polls :o
Random blocks: Lastly just check random blocks around you never know!
Hope I helped ~Sky