"shl7070"
"1) What to do with the workers when they have nothing serious to do? Especially in case that all terrain got improved and railroads are still far in the future. I have no good places to join them and they are eating up my gold."
It is hard to know what is going on, but I would wonder how you can have too many for long. I would guess you do not have enough towns at that point. If you were always adding towns, you would not run out of work, as the AI will not have done a good job with their land.
"2) How can I get the pyramids built. I never managed to build them before the AI and generally can build only 1-2 ancient wonders (lighthouse on archipelago and the mausoleum which is often built when I lose the pyramids race), the difficulty is regent."
Well I do not try to build it, unless it just a very easy game. You should be able to do it as long as you have a decent town. First have enough wokers to get mines on all tiles that can use one and will be worked.
Second, get to the town as large as you can as soon as you can. Third start a pre, if you know it could be a close race.
I pretty much do not build those either, but if you made a strong city, non capitol, you should be able to start a pre for what ever wonder you are interest in having.
"3)Why the AI always gets a tech lead initially in regent and only in late ancient I cath up with it?"
If you use barbs, the AI has two things going. 1) trading 2) techs from huts.
"It's not right that you lose resourced more often then gain them."
Boo hoo, actually if you took more land, they would end up in your land and not be an issue. All land is going to be mine, so I am not real concerned about that. The depleted resources come fairly late in the game and are just a non issue.