WordPress Infinite link problem?

You would need to determine where in Core the code is located that paginates the comments.
Then you would need to decide on a suitable hook to use:
https://developer.www.ads-software.com/reference/
You would then check whether a comment exists on the paginated comment page.
If not, you would redirect to the original post.

Doing this would require some coding knowledge.
If you do not feel comfortable doing so yourself, you may want to consider hiring a developer.
If that is something you are interested in, you can do so here: https://jobs.wordpress.net

Alternatively, you can search the plugin repository for an off-the-shelf solution:
https://www.ads-software.com/plugins/
One does not immediately come to mind.

@carike

I have no coding knowledge. So I asked for help here. I tried all the plugins. There are no plugins that solve this problem.

This is wordpress problem. I thought maybe wordpress developers could solve this. Having infinite links is wrong.

WordPress is awesome.
It allows people to create sites they never could have created otherwise, given personal coding knowledge and / or time constraints.
However, a DYI solution does require an investment in terms of your own time.

You are welcome to create a Trac ticket here:
https://core.trac.www.ads-software.com/newticket
However, I feel that I ought to manage your expectations in this regard.
WordPress developers are volunteers. They work on projects that are of personal interest to them, or that are of interest to the organizations that they represent / their sponsors.
It is therefore very possible that your ticket may not be taken up, or if it is taken up, that it could take a year or more for a solution to be implemented.
Therefore I strongly recommend that, if this is important to you, you hire a developer to create a custom solution for you.

@carike

Yes WordPress is awesome. This is a problem and that’s why I wanted to report it. I thought maybe the friends here can help. thanks

Creating patches / custom solutions is unfortunately outside of the scope of the help offered on these forums.
Creating a solution is certainly not impossible, but it does require some research (probably a good couple of hours).
While the question is allowed and will remain here in case someone does want to answer, again, I feel that I ought to manage your expectations in this regard.

All the best ??

The problem continues.

The Trac ticket was assigned and the milestone was set as 5.5.
As I have explained to you, WordPress code is created by volunteers and they decide to take up tickets based on their particular area of interest.

Changes are also subject to the project release schedule.
The 5.5. release is currently scheduled for August 2020, which is the earliest you can expect a fix in Core. That is if the patch can be created and all the necessary testing done in time. It may take longer.

As I have previously suggested, if this is important to you, you may want to hire a developer to create a plugin for you.

All the best.