Lol your Elo is 500. How much lower do you want to get?!
I wish I could manually set my ELO down way lower than what it is.
If the opponent doesn't make mistakes, you can't win, even if you are Magnus Carlssen. At 500 rapid, the mistakes are generally more obvious, of course. If you were actually able to win regularly without the opponent making simple tactical mistakes, your rating would be 1500+.

At your level, that's how chess games are won. Someone blunders and the opponent takes advantage. Usually the next to last person to blunder wins. It's just a stage folks go through. Keep playing, maybe do a little studying and you'll get better.
Yes, but why not start beginners at an Elo of 100 or give them an option of lowering their Elo? Then they would be motivated to play to raise their Elo. When they are started at 800 they see that they are probably doomed to lose over and over and over.

Why would you like playing against people who are way weaker than you are?
Chess is a fight. Is there any pleasure to be derived from beating up somebody who's ability to defend themselves against you is woefully inadequate?
Or is a good scrap against an equally matched opponent more fun?
My ELO doesn't match how I play chess at all. I don't see myself improving if I can only win if my opponent does a mistake and not by my own skill.