for game 2:
notice how black has 2 big territories : up right and bottom + left.
How do they came to be ?
i like to ask myself those questions when i auto analyse my games.
for the bottom:
lets have a look around move

B have position on the right and left, normal as he received handicap.
The bottom is wide open, you are right to play on the area (i think).
let move to

black is the first to move elsewhere, the whole bottom right is his territoy now, and you have a floating eyeless group ,cut fro mthe rest; B isnt even cut from the center
the sequence between
to
is a disaster for white Do you see that now ? did you realize it during the game ?
Why ?
You choose to play high, on the 4th line (this isnt wrong by itself).This doesnt give you an easy base, and it doesnt prevent black from gaining territory. This is good when you cannot enter deep because the opponent will put you in great danger, or if you want to let you opponent get territory while you gather strength to strike elsewhere. This is almost never done to make center territory.
Here there is no weak B position to attack, and the space is wide enough that you can live no problem if you come on the third line (J3/K3).
That way you would have build you own territory without a weak group
likewise n16 didnt turn out well: you lived small while b became big. after

@N15 you are in trouble and have to let B grow while you live small. I am not absolutely sure N16 is wrong but it you want to try it you need to develop it toward your stone with n14 before B plays N15
If you wanted to live on top, then O17. Or attack at G 17 (now or after some preparation -- not sure).
i let better players correct my errors here