For what it's worth, here's my advice:
Stop looking at Flickr and 500PX. It's eye candy. Instant high colour, high drama mental flavour hits... like visual chewing gum: A big flavour hit for a very short while, then you realise all you have in your mouth is a grey, flavourless lump of viscous crap.... and you will eventually spit it out. Look at the stuff that has endured the test of time and learn to value what makes it so great. Weston, Karsh, Winnogrand, Sherman, Klein, Knight...(you get the idea)... in short, people who are NOT on Flickr or 500PX. 500PX and Flickr are nothing more than people trying to outdo one another with high visual drama. Sure, there's some good stuff on there... obviously...(before anyone writes the inevitable rebuttal), but why embark upon this internet popularity contest? Does it really mater if people you don't even know click "like" or not? They will hardly ever tell you WHY they like it anyway, so it's not as if they are teaching you anything with their feedback. Do you want to be a good photographer, or is your ambition nothing more than to be "explored" on Flickr?.................
In short.... stop using such sites as a measure of your talent.