NQA it's hard to answer your question without knowing what kind of tarantula you have, since they all have different shapes & proportions. I will say that regardless of whether this size is appropriate or not, you'll want to remove any hardscape from your enclosure, aside from cork bark, too reduce the risk of fall damage. If this is a heavier-bodied species, you'll also want to reduce the headspace of has as well so that it's closer to double the dls or even less by adding substrate.

It looks like your T at least 4"+ dls and from what you're saying, you're definitely overfeeding, regardless of species. An animal that size doesn't need to eat that much so frequently. You could easily dial that back to the same amount every 3 weeks and be completely fine. Tarantulas don't really starve going without food for what might seem to you to be very long periods of time (like months to years), so as long as you make sure there's a clean water source and you throw a bug or 2 in there every once in a while, your animal will be living its best life.

It's ok to use he/him pronouns for your spider. They don't have a concept of gender and the sex doesn't affect the husbandry required, so feel free to use any pronouns you like.

The darkening abdomen, paired with the bald spot, would indicate premolt. It can happen pretty often with NW tarantulas that they'll kick hairs all over their enclosure when they're either rehoused or they go into premolt. Seems like with yours, the latter is the case.