Defeated by BBG Week 5 Arms & Abs

Hi guys. It's my first time doing BBG and also first time reaching out to others for support/ advices on Reddit (very thankful to have this sub)..

Basically, I've been doing weight training for a while and really enjoy it. I loathe HIIT and never really did any HIIT workout before. Earlier this year I decided to give BBG a try to change up the routine and challenge myself a little.

Today is my BBG 1 Week 5 arms and abs day. I have fairly week upper body comparing to lower body btw. So I completed circuit 1 and onto circuit 2, up to incline push-ups, I could barely do 4 reps. My arms just couldn'tttt do another one so I went down on the floor to do some modified push ups instead. Again, got really tired after just a few reps.

I gave up at that point and went on to do some other weight exercises... Usually I would pushed through times like this.. I don't know if it's because I haven't trained my upper body for a few days (4-5 days due to changes in schedule) and I got weaker a little or if it's my mindset.

I've been doing BBG and basically having a somewhat-love / hate relationship with it. I keep telling myself that I would be so happy doing weight lifting instead... but at the same time, I don't want to give in.

Would love to hear some of you guys' advice on this. Thanks! I'd really really appreciate the input.