From the provided sample I strongly disagree that you are blundering too much for your rating - and even more so considering your time usage.
In fact I do see very few "traditional" blunders but just some evaluation swings, positional mistakes.and superficial play.
From the first glance
game 1:
Bb7 was kind of strange and played in 4s (you have a bunch of candidate moves, why not try to calculate something) Not a big deal though.
11...c5?? IS a blunder, played in 3s
---some superficial play...from both sides..
24...Nxd4? is not a blunder, just another superficial move - also expected played so quick. Just stop and you might find a5!
31...Bxf3? you took some time but have not noticed a tactic here.
...some endgame moves later...
69...Rxh6?? - did you blunder the pawn or do you not know the Philidor position?!
-----------------
2nd game:
- questionable opening and early middlegame leading to difficult position.
15. Nf3? not a blunder in the tradtional sense - looks more like a pointless move/ tempo loss. Your position is very dangerous and you are hanging by a threat here.
22.dxe4 you fought back well until that point but looks like you are underestimating the opponents' resources again.
35...Re7 ok you blunder a pawn
41.c4+ played really fast with 5+ minutes on the clock.
Then you manage to trick your opponent in time trouble...
So overall - No I do not think at all that you are blundering too much, especially considering you handpicked the game as your blunder games.
Instead you could pause at some moments which you consider critical, look at tactical resources and improve you strategical understanding IMO.
In fact I do see very few "traditional" blunders but just some evaluation swings, positional mistakes.and superficial play.
From the first glance
game 1:
Bb7 was kind of strange and played in 4s (you have a bunch of candidate moves, why not try to calculate something) Not a big deal though.
11...c5?? IS a blunder, played in 3s
---some superficial play...from both sides..
24...Nxd4? is not a blunder, just another superficial move - also expected played so quick. Just stop and you might find a5!
31...Bxf3? you took some time but have not noticed a tactic here.
...some endgame moves later...
69...Rxh6?? - did you blunder the pawn or do you not know the Philidor position?!
-----------------
2nd game:
- questionable opening and early middlegame leading to difficult position.
15. Nf3? not a blunder in the tradtional sense - looks more like a pointless move/ tempo loss. Your position is very dangerous and you are hanging by a threat here.
22.dxe4 you fought back well until that point but looks like you are underestimating the opponents' resources again.
35...Re7 ok you blunder a pawn
41.c4+ played really fast with 5+ minutes on the clock.
Then you manage to trick your opponent in time trouble...
So overall - No I do not think at all that you are blundering too much, especially considering you handpicked the game as your blunder games.
Instead you could pause at some moments which you consider critical, look at tactical resources and improve you strategical understanding IMO.