Rear wheel won't stay in position I'm a bit at my wits' end (not that I know that much about bikes).
I used an old Gazelle Formula Randonneur frame and switched out most of the parts.
However, after some time of (rather light) driving, the wheel always comes lose and starts jamming.
Either the wheel isn't centered anymore and rubs on the frame where you can see &quot;FORMULA RANDONNEUR&quot; written.

Or it rubs b/w the cassette and the frame:

The only way I can prevent the wheels hinge from being too loose, is to tightening it down so hard that the wheel won't move :)
I went to a bike shop near but they only told me to simply readjust the wheel.
While I am able to do that, I don't want to do it on a weekly basis or in the middle of the night.
As far as they were concerned &quot;this wasn't broken&quot; -- but this can't be the solution to the problem, I hope.
I also found
Rear wheel won&#39;t move or keeps falling off
but I don't know how well this translates from a disk brake bike to mine.
Do you have any suggestions?
Some more pictures
It's some combination of:

QR springs not pointing the right direction. Try removing them completely while working on this, which can also help with the next thing.
Relatively thin steel dropouts not playing nice with this combination of QR skewer and axle ends. If the axle ends are poking through the dropouts and touching the QR nut or cam, or doing so as the whole thing presses together, it won't clamp right. This can happen sometimes putting new hubs and QRs on old steel frames. Solve by using a more traditional kind of QR, i.e. a steel internal cam one, and measuring to corrobrate you are well away from this being able to happen. Taking away the springs completely can sometimes be the quick fix to this problem.
Cam surfaces on the QR need lubrication. Put a drop of oil on the barrel that the lever pivots around.
The QR has some worn parts not seen in the photo, like the plastic bushing part.
You're undertightening the QR. Lubrication can help with this, or not, since external cam QRs are basically bad.
If your dropout alignment is wrong, for example by way of putting a 130 or 135 wheel in a narrower rear end, the QR is now needing to flex the dropouts back into being parallel before clamping happens. This can cause or add to the problem.
You've got horizontal dropouts and the external cam QR isn't providing enough holding force.