Hello,
I see that screenshots are made via AnyDesk, thus I assume the device is accessed and controlled remotely. Is it possible that slow response is only a result of slow internet connectivity and high latency?
I also have noticed that the router contains settings from legacy firmware versions, thus I assume that previous firmware updates were performed with keeping device's configuration. Could you try reset to factory default settings?
Other than that, the attached troubleshoot file does not indicate any issues, like memory leaks, no free space, flash faults or any other errors, which could lead to slow performance. The issue might be hardware related.
One more thing that can be attempted is to update to RUT9_R_00.07.04.3, with Keep settings option disabled, unless you have reasons to stay on 7.02.7. In this case, at least try reset to factory defaults.
Best regards,