More bands would help you Markus. 80/17/12 spring to mind. 80m antennas will be large and daytime D-layer absorbtion can limit its usefulness. But a band that lets you work some locals will be an improvement over 100% contest QRM on 20/40.
17/12 will be free of contest stations. But right now they’re free of all stations as there is often little to no propagation on them. They will improve and I would suggest adding 17m as a minimum.
Being SSB only limits you. CW requires learning and practice, you cannot just add it to your arsenal like a new band but it would let you escape some of the contest mayhem.
Digital modes offer an escape especially as you can go onto 30m and escape content madness. Needs a computer of some kind and you need to practice digi modes with that kit before trying it on a summt.
Don’t overlook VHF & UHF. You can do lots from a summit with a small Yagi. Just needs a bit more publicity to get people listening. You could aslo consider setting up some regular microwave activations using the cheap but very worthwhile SG Labs transverters. I’m sure the few people in DL playing on 23cms would jump at the chance to try for regular contacts into HB9.
Finally, you could admit defeat and just try and work as many contest stations as you can. At least you can go out and activate and get the QSOs even if not with normal SOTA chasers.