I hope for your sake you get a different installer Thursday. Things I see from your photos: As both peds48 and I have stated, using an 8 way splitter when it is not needed is poor practice. While I doubt it is causing your problem it does introduce loss that is not needed. Second, I can see when your house was built they used crimp connectors. He just connected those wires, I would have replaced the connectors with good compression connectors. Third, the work is rather sloppy but I can let that slide as he is not finished.
Also, since when do you "not have time" to finish? Installing is not a time clock job where you drop what you are doing when the bell rings. If he was going to come back first thing the next morning I could probably accept it but putting you off for almost a week does not cut it.