How to improve for actual chess?

So, my tactics rating is 1850 whatever this means because my actual in-game rating is half of that. How do I progress from this to be able to actually play decent games?

First, you need at least 500 puzzles solved to have a reliable puzzle rating.

If you want to improve, then
stop bullet, blitz, variants, play rapid & classical only
whenever you lose a game analyse it so as to learn from you rmistakes
use all the time allowed by the time control. Time is a resource.
activate move confirmation in your profile: think about you rmove, play it, check it is no blunder, confirm
example

Move confirmation is kinda cheat though because you couldn't do that in OTB.

You don't really need move confirmation. Before a move just do a quick blunder check.

I know that Bf3 was a blunder due to e4 both attacking and opening a discovered attack on the rook but there's no time to spot that because I don't have the time for that. How do you guys get this done in like 20s.

With enough time my process is:
- which of my pieces are attacked.
- which of my pieces can be attacked next move
- is there a check?
- is there a free capture?
- is there an exchange where I lose less than my opponent?

And ideally: is there a mate in 3,4,5 but I don't have time for that on every move even in 10+5.

I guess for puzzles it takes me at least 45s. I can't spend 45s on every move if I only have 10 minutes because games can easily be 30-60 moves.

#6
You have 5 useless minutes left at the end of this 10+0 rapid game so you played as if it were 5+0 blitz.
So you surely had time for move confirmation to blunder check.
Yes, move confirmation though allowed is almost cheating, but so are other features like automove, auto draw claim...
Once you have the habit of bunder checking you can do it like #5.

#6
I think this is wrong.
Let me explain why, after my experiences, I have realized that such algorithms work more efficiently when
1) You understand the position
2) You know things happening around you (I mean what is happening in the game, like the bishop is threatening a tactic, etc.)
3) You CALCULATE
I know the 3rd point sounds dubious but really, this was the major reason I was stuck around 1980-2000, although my rating is still not high, but I believe in "Practice makes a man perfect". Even if you calculate 3-4 moves perfectly, you can be on another level.

After doing these 3 three things, I have significantly increased my rating.
I think after this if you confirm the move by using the method mentioned in #6, I think it makes more sense than just using #6
I hope my suggestion helps. (mainly the things I learnt through experience).

I would almost never recommend you move confirmation.

~DrZwischenzug

The move confirmation it's not a bad idea. It seems to help against 1 half move blunders like hanging pieces, which is a case with inexperienced players. But in the end you need to turn this thing off if you want to make any progress in chess. You should see what's happening on the board before you touch the piece. If you play on a real board with somebody you cannot grab a piece and say, "Ah you know, I don't like this move. Let me put it somewhere else. Oh wait I forgot where I took that piece from. Do you want a draw?"

The more experienced you are the more information in a position is subconsciously registered and conscious thought goes into other aspects. It is just like mathematics as you progress in it your understanding and ability to assess problems is elevated and information some must consciously look for and consider is assimilated automatically by others allowing them to either arrive at solutions faster and better accuracy, or intake greater information to come up with a solution which may increase accuracy as well.

Work at chess more and things will improve for you as time goes on.

-Jordan