Help, with newer-ish sod

So we just had our home built and the sod was laid in January. It was a horrible job to say the least, the builder sub-contracted it out to the lowest bidder.

Well I was able to pull it from a brown mess to a lush emerald green carpet. All it took was a ton of water and some starter fertilizer 18-24-6.

Now about 60% of my yard is floratam the rest is Bahia. The Bahia isnt under irrigation so it isn't really an issue as I know when the rains come it will green back up.

The floratam is causing me problems. So I treated the yard with an anitfungal granule treatment as well as some weed and feed 29-0-10.

The antifingal was about a month or more ago because of what I thought was dollar spot, well it really didn't do much so about 2 maybe 3 weeks ago I reapplied the weed and feed. Still no improvement. Not sure what direction to take it in, I don't want to pay someone to do my yard as I'd rather do it on my own.

Also I water each zone for 30 mins twice a week and I've applied a "all in one pesticide" about 3 months ago. Here are some pictures of what it's doing. It's all turning yellow, almost straw like and thinning all over the yard.