Well, I believe that there are some good trap tracks too, but I want to criticize the more popular part of this genre.
I am going to focus mainly on rap trap and explain why I dislike it. I mean those voice modulated (with autotune or similar) rap tracks. EDM Trap is better, but it is not very good too. Here are some points where I will try to explain my thoughts.

1. The name of this genre
   It is called trap. A trap for example is a tool to catch animals allowing them to enter, but disallowing them to exit. If I tell someone (an old man for example) who isn't into music that I listen to trap music he might imagine weird things such as music to harm me.

2. Too much minimalism
   Sometimes minimalism gives an interesting effect, but here it only makes sound worse. I can't hear anything special in those tracks

3. Mainstreamicity
   I am often very tired of hearing those tracks at streets from bluetooth speakers for example. If I hear more I automatically feel worse. For some reasons I get a headache while I am listening to this music longer than 10 minutes. Also mainstream music is commercial, but about this later.

4. An ugly composition
   This music has got an ugly composition. It is mainly loosely inserted ugly sounding bass with added elements like pluck, hi-hat and snare, which being honest do not sound good.

5. Lack of originality
   Almost every snare and hi-hat in this music sounds the same. Not even the similar. When I need to explain other sounds I can say they are very similar to each other. It gives me the feeling that I'm listening to the same song over.

6. Does not require talent / requires little talent
   Some of these creators don't even do their music. But if they were not lazy they could have done it by yourself. It is usually very easy and it does not require a lot of knowledge of musical theory. Make a simple beat in rush, write text about parties, girls, cars, something else or nonsense then you can use autotune. It will correct your fakes making you sound like a robot. You can fake as you can! Then you'll get money.

7. Text that does not represent anything
   The lyrics in most songs are basically about bad things. It also contains a large dose of curses. Anyway, why do you have a text that you do not understand because someone here used autotune?

8. This type of music is often listened to by less intelligent people
   This type of music attracts a lot of vulgar and not very intelligent people. Some rappers are covered in tattoos and are people who should not be imitated. After all, there are a lot of people who have them as authorities. I have even heard about one girl that was tattooing eyes for one rapper. Yes! Her eyeballs!

9. Killing the original hip-hop.
   When I thought rap I have always imagined a guy saying words to the looped simple drum beat. Now kids can imagine it as robot singing to the weird type of music. I know a guy that listens to rap music. He said that many of new rap is hard to listen.

10. This is mainly about production.
    I have an impression that the production is more important than everything else. You don't even need to make an effort. Autotune proves that.

11. I do not understand people listening to this kind of music
    Someone has told me that people listen to such vulgar and ugly music because it is "catchy". EDM Trap sometimes tends to be catchy, but only sometimes. Most tracks for me don't sound catchy. And they are more "annoying".

It was a bit difficult to explain that, but I have done it. Anyway thanks for reading.