CPU Analysis On Won Games

I just want to say that computer anaylsis on won games is mistaken in calling out mistakes.  Here is an example:

20. Bg4 looks better to me.

22. Rc4+ forces the king onto a light square and you have a light squared bishop, Hmmmmm

24. Rxf2 You already had a pawn in your sights.

27. Rf8+ frees your Bishop Rf5 blocks it.

I give up. Even I can spot this stuff.

20.Bg4 immeaditly gives lead back with Qxe4

22. you are right

24. Rxf2 leads to a boring endgame and the check is a free move anyways computer says you are right though

27. next move is forcing a rook trade and check anyways if he didnt screw up and Rf8+ allows king back to center Rd3+ is the best since it eventually forces a bishop for rook

"i just can't stop screwing up"  lol!!  

this is me squeezing a fart out

hm i think its better to analyse the games you win, cause people tend to forget bad memories, so its more easy to keep in mind working attacks etc.

But i also wonder, how do you analyse it with a computer ?.
Is there some kind of program that says you lead the attack from move x to y and made a mistake there or there ??

it is a chess.com feature after you finish a game you can review it.  0n the right it says give a trophy, add to friends, and computer analysis.  you get a message when it is done and it shows mistakes, innacuracies, and blunders.  it shows lines and says who has the advantage.  the number shows who is winning - for black and + for white