Do you consider what you'll lose if you used straight bets and it doesn't go your way? For me somehow it's a trigger for addiction and big financial loss when you ever a losing streak while using straight bets. It crosses the line between gambling for fun and gambling for profits sharply.
Anytime I'm gambling on straight bets, I'm surely not gambling for fun because I'm always prompted to use funds in not ready to lose therefore I'm more about recovering my money with profits more than actually gambling for the fun
I hope you haven’t forgotten that you can bet low even if you’re taking a straight bet. It’s not a must that your bet has to be insanely high before you can bet on a straight bet.
If you genuinely want to have fun and don’t like going for parlay or you feel you won’t do well with parlay then you simply just have to reduce your stake to something you are comfortable with, and you should be able to enjoy it and not have regrets too much if the game goes haywire.