Well, it’s unfortunate you’re going through that with your server in EU. I have ZERO intentions going from US to EU servers to “check it out”, I’m well adverse on how those types of situations are happening since I’ve been playing NW during Alpha/Beta phase and every day since Launch. Sounds like your server in particular is riddled with bots (maybe more than usual), but who’s isn’t anyway, we all suffer from bots and other cash grabs. Perhaps a better, more economic server might be in your interest. it wouldn’t hurt to create a “alt” to check out other EU servers to see if their bot/economy situation checks out better.
With your TP situation, BiS items can go for 150-200k even more depending on the type like gear, weapon or jewelry, it’s not uncommon. That’s why they are called “Best In Slot” (BiS) which are highly desirable pieces of craft and as crafters know, they rarely come crafted with those particular perks and when they do and players want/need that piece of gear or weapon, the price tag is usually high enough that end game players can afford. Sure, a multi-million dollar company can buy it, and yes, there’s a problematic with gold-sellers who can scoop up those items too, so, what’s the solution here? No one knows for sure. It sucks, but until AGS has a definitive solution to stop the bots/gold sellers/dupers, it’s going to continue and legitimate players will continue to suffer.
As far as play time to gather all those things, I roughly play ~6-8 hrs of New World per day and focus on mainly harvesting/gathering and sell those good I’ve mentioned for profit. As of late, I would farm for about 1 hr prior to our “Elite Chest Run” on my server, gather Iron, Silver, Starmetal, Rawhide, Wyrdwood, Ironwood, Motes and some Raw Foods to stockpile. Then, conduct the chest run and loot T3 refinery mats, gems, furniture schematics, gear/weps/crafting gear and sell. And that run would take about 3 hrs from start to finish, then spend 1 more hour going back to harvesting/gathering again to make more profit. After refining my goods and all, I’d sell them on the TP, log off, then the next morning log on and see how much profit I’ve made. usually a full 18 hrs go by w/o me playing New World, so, I don’t “sweat” the game any more like I did before when the first game launched, I was hooked on playing 8-12 hrs per day.
As far as the ppl selling 6k umbral for 10k gold, they just want to bump up their Gear Score faster. 10k is pretty cheap for 6k umbral tbh, plus, add 400 umbral per 625GS slot times that by 4 or 5 Gypsum and that’s about ~8k umbral shards for 2,000 Umbral from x5 Gypsum casts plus the 6k from the 10k coin sale, so, yea, 8k per day can bump you up to 625GS/Expertise in all slots faster than most people.
Not for nothing though, many players are experiencing what you are experiencing and they have the same frustrations. It’s really out of our hands at the moment. However, the players DO have the ability to take control of the TP economy and the prices, but, it really depends on the server as a whole. I hope some of this makes sense and wish you the best of luck! 
… I started to lose my hope and fun to play this game at the end 