So you can't do 3D modelling? Join the non-3D Modellers Club - there are many members here in the forums. So you can't reskin? Ditto.
I have limited reskinning skills (it took me lots of time, practice, time, patience, time and perseverance) and I have never succeeded at 3D modelling (I have Blender installed and I keep it up to date but that is the extent of my skills).
So people "hate you" - that is their problem, not yours. I know that there are forum members here who have an "intense dislike" towards me because of some of the responses I get when I post my opinions, but I don't care! I am also certain that I am on several (many???) ignore lists but, again, I don't care. I keep an ignore list of my own (and no, you are not on it otherwise I would not be responding to your post).
Trainz is not everything. If you look out the window you will see an entire world of real people (not animated objects) and real things to do. Go out and join in the activities and enjoy the real world for a change - that is what I do.
Take a break from Trainz and especially from Discord (are there actually any sane people there?). I once spent 10 minutes on Discord and then dropped it, permanently. A total waste of time in my opinion (no doubt that will generate some "hate mail" - bring it on!).