@kutloello the bad news: the more muscles you got on your frame, the more oxygen you need for the same stupid bodyweight rep ...
just having much muscle tissue means nothing. you probably responded well in terms of hypertrophy (what's kind of useless in your case). you have to ask yourself what's your relative strength (e.g. what's your 1rm back squat vs the IPF WR in your weight class? what's your weighted BMU vs the Streetlifting WR?). Only your maximum strength will help you in fast & heavy power workouts (e.g. 1 to 4 min yolo unbroken) but not just the total weight of your muscle tissue.
1) you should do more maximum strength training. I.e. 2-4 rep ranges with clear strength progression. E.g. weighted pull-ups, weighted BMUs, heavy & slow back squats, heavy clean pulls, heavy sandbag over shoulder, etc.
2) do more metcon reset workouts simply because you will be good at it. I.e. one round takes about 4-5 minutes, followed by 3-4 minutes of rest. For example, 3 sets of Fran with 3 minutes rest in between. Or pick any 20 minute benchmark workout, stop after 4 minutes to rest 3 minutes and continue where you were. Over time pick workout setups so that a round last 4:30 minutes instead of 4:00 minutes; that's your progression
3) do more 15-25 minute bodyweight pacing workouts because you suck at it for a reason. prefer fullbody movements, e.g. burpees with two-feet take-off and jumps (no slow stand up), airsquats, etc.