Rule #1 - never delete anything - no matter how crap it is - its worth it as a reference and inspriation for the future, or at the very least you can look back and while it may have been utterly shit, at least maybe what you do later hopefully isnt quite as bad
You sound burned out to me, go out get pissed with mates, drag a couple of fluffies back from a club or whatever your thing is - maybe next door neightbours dog/goat etc?
I never try a write whe I get home from work - its a complete waste of time - my day job is way too shitty and stressy to have a hope in hell. So often Ill just frig aorund playing random crap, often on a piano, not even a synth - just as a way to relax so I can forget the crap day as quick as possible and enjoy the rest of the evening, whether in or out. I expect most of us are in a similar boat one way or another.
If you stop being so stressed about it and stop trying too hard, who knows, maybe something will come together. What is the point anyway? You want to be making stacks of cash from producing? Is that realistic? Do you have people coming to you to ask to work with you? If not - accept it as is for now and just have some fun/relax etc.
Try doing a remix or something - there a huge advantage to doing them - even if they never go anywhere - you get to mostly forget about trying to write (someone else has done that) and can more or less focus on production and cool fun shit, end result - you get some production exprerience that eventually you can very quickly and easily re-apply when writing you own stuff - the less you have to think hard about when writing, the easier it is. If your thinking of anything but music, then you are being distracted and technology we use can be very distracting.
I sound like I know it all - no - my stuff sux too - Ive just learned to accept that, have fun along the way, and not worry about it or be particularly self conscious about it - people wither like it or they dont, and I know allready my production ability in my home studio sux (accoutically its really bad and I hate using cans) and there isnt alot I can do about that rigth now.
The only advantage I have I guess is Ive done audio production work professionally years ago (nothing fancy - just music and audio post production for corporate/promo films, national TV etc) so alot of the technology is second nature to me - at least on the hardware side - but the stupidity of software user experience designers still never ceases to amaze me, and given that production software puzzles the hell out of me at times (I'm a software developer by trade, so not even some computer illiterate), it no wonder that many people have problems remaining creative with it...
BTW - what production methods/software do you use - that can make a hell of a difference.
Also allmost anything can sound good in either shitty accoustics, or when played loud. Most of us are guilty of both

Having the levels turned down tends to help with both problems.
Another random observation - if something loops really well - then its often really hard to move on from it in a useful way. Introduce some more sounds into the loop, cut others and break it up, then it may natural progress/evolve to something else. Making loops is easy - getting out of the damn things can be quite hard. If you typically edit around 4/8/16 bars for example, then you will mentally get ingrained with the loop - allmost any style music become a form of trance in that state. So when editing, dont loop around loops, start well before and loop back well after - it keeps you alert to whats actually happening, otherwise you just get used to it and ignore it.