No response so I've removed all the fiction.
This done in Changeset: 79617384

Hi, Welcome to OpenStreetMap.
I've removed your new outline for the park as it is a duplicate of the existing outline. I did though transfer your new data onto the existing park outline. So you have still contributed to OSM.
Regards Bernard.

Hi, The most important info about a defibrillator is its location (inside, outside attached to wall, visibility from road or car park) and accessibility (24-7, office hours, weekdays). It wastes valuable time going to the nearest AED if it's unavailable.

Please see :- emergency=defibrillator

Regards Bernard.

Hi, I squared up the buildings. In iD select/highlight the building, right click, click the square icon, building is squared up.
Regards Bernard.

Hi, again the name is on the larger area.
Regards Bernard.

Hi, the small area would be termed a playground. The park name is on the larger park outline. I've made the amendments.
Regards Bernard.

Hi, Are the ways 750756019, v1 and
750756018, v1 really bridges? ( I just doesn't look right.) If not could you please correct your tagging.
Regards Bernard.

Hi, Is there still a foot crossing here? If not then the crossing point on the railway needs to be removed.
Regards Bernard.

Hi welcome to OpenStreetMap.
Is "Local Assault Course" the formal name of this area or is it one you gave to describe the feature? If so can you give the source of the information regarding the name?
Please be reminded that features added to OSM must be verifiable to other folk.
Regards Bernard.

Amended areas added residential area, remedy dragged areas

Hi, Welcome to OpenStreetMap.
Your building relation went a bit awry. I've removed the multipolygon relation, terraced the building making number ten the end unit. I think this is what you were trying to do. If its not OK please let me know what's wrong.
Regards Bernard.

Hi, Welcome to OpenStreetMap.
Thanks for your contribution to OSM. I changed the tags from semi-detached to residential as it better describes the houses.
Regards Bernard.

Hi,
Please don't join areas like grass to highway center lines. The grass area does not extent to the middle of asphalt footpaths or roads.
The correction of these errors is difficult so please consider zooming in and precisely map the grassy areas.
Regards Bernard.

Hi, grass areas (and most other areas), do not extend to join the center lines of railways or highways. Please consider how difficult it is to edit features when areas are fictionally joined to them.
Regards Bernard.

Hi, The name on the building in large letters for all to see is The Kensington Hotel. So this is the on the ground information OSM should take as the hotel name.
You may however have a case for adding an alternative as an official name. Please see :- name=*

Thus I have returned the name to the original one.

Regards Bernard.

Hi,
I wonder if you can help correct a problem here. The steps Way: 473394175 and path Way: 757075103 are crossing (unjoined) on the same relative level/layer being -1 This is clearly wrong. If the ways are on the same layer (-1) then they should join. If they are not on the same layer then one should be on a higher or lower layer than the other.

The layer tag is explained here :- layer=*

If you don't think you can do this maybe you could say which way is above the other. I may be able to sort it out.

Regards Bernard.

Hi, Welcome to OpenStreetMap.

I amended your opening hours tag to suit OSM practice.

Regards Bernard.

Hi, Welcome to OpenStreetMap.

Yes you are correct, this line is in use for passenger traffic! This section however is a siding off of the main line to facilitate the platform. The siding then rejoins the main line.

I've therefore reinstated the service=siding tag.

Regards Bernard.

Hi, Welcome to OpenStreetMap.
just to inform you that in the absence of a oneway tag OSM infers oneway=no, thus your oneway=no tags are not needed. I've removed them for you.
Regards Bernard.

Hi, regarding Node: 2970769212 with only a tag of barrier=yes. It would be great to know what the barrier actually is please?
Regards Bernard.