How to disable same-sex attractions and male Sims to not dress like women.

The basic answer is that you have to set every sim individually in CAS via manage worlds. It is time consuming, but I do that with my own base save and only start new games with my base save. I also tweek setting in my MCCC mod to achieve desired relationships allowed in-game. Like I said it is a tedious process, but doable. I also delete all sims which do not fit my desired gameplay and only import my own sims to help with that. It is a long process, but can easily achieve whatever style of gameplay a person wants.

As for the SDX drops, there isn't a way to delete them once in-game. You could search for mods to hide the content you don't want to see. I have done that with all the Star Wars content and some other content I will not use. Searching on the internet, I am sure you might find mods that are helpful if you play on a computer.