Macbook pro 15-inch, 2019 - Constantly getting hot and slowing down.

Since your etrecheck report mentions a "Battery failure" and your MacBook Pro is running hot frequently, it's likely that the battery issue is contributing to the overheating problem. It would be best to get your battery serviced as soon as possible to address both issues.

A virtual private network, or VPN, is a private connection over the Internet from a device to a specific network.  VPN technology is widely used in corporate environments. If you need to be "present" on an institutional network, a VPN is a great tool for accomplishing this. It is generally issued and controlled by the institution.

Almost all other uses are a SCAM. There is generally no need for you to have a private (and almost always MUCH slower) connection to a VPN vendor's Network, except to make it easier for them to harvest your data to sell. If you are behind a Router you control or Trust, there is NO security advantage whatsoever in using a VPN. Your connections are already encrypted in most cases.

If VPN vendors just stopped there, it would be bad. But many of these packages also insist on scanning all your files, non-stop, -- nominally looking for viruses, but who knows for sure what data they are harvesting. Their non-stop file reading punishes your computer's performance in the process.

Some also break into your other secure connections so they can be FIRST to examine your data, often leaving your Mac MORE vulnerable to attack.

https://gist.github.com/joepie91/5a9909939e6ce7d09e29

<< Would that have an issue on the performance? >>

It very well might.

Generally when your Mac thinks it is hot or sick it will spend a LOT of time In kernel_task, running an idle loop to cool down. Your report does not have that specific symptom, but that does NOT mean the battery is no problem.

You have several other messy things that might be contributing to poor performance and overheating:

• By far the easiest way to cause poor performance, instability, overheating and crashing is to install ANY third-party speeder-uppers, Cleaners, Optimizers, or Virus scanners, Bit Torrent, or a VPN that you installed yourself. 

• Third-party file Sync-ers such as DropBox, BackBlaze, OneDrive, or GoogleDrive can ruin performance.

You have examples of several of those installed.

if you want more analysis, just post back.

Major Issues:

Anything that appears on this list needs immediate attention.

Battery failure - Your battery is reporting that it needs to be serviced.

Mac Repair and Service - Apple Support

Would that have an issue on the performance?

A portable Mac will not function properly with a battery that needs service.

Mac Repair and Service - Apple Support