Redirect using .htaccess without trailing SLASH

I am long time reader and never had to ask a question. Mostly got answers just by reading this extraordinary forum. Recently I have been trying to resolve an issue with htaccess for several days now & it has kept me from progressing on my web project atm. Your help would be appreciated.

Server: OpenLiteSpeed

Current Set of Rules .htaccess (.htaccess resides in root directory)

RewriteEngine On
Options +FollowSymlinks -MultiViews -Indexes
DirectorySlash Off

RewriteBase /

#set default characterset from server end
AddDefaultCharset UTF-8

### Rewrite Rules Added by CyberPanel Rewrite Rule Generator
RewriteCond %{HTTP_HOST} ^www.(.*)$
RewriteRule ^(.*)$ http://%1/$1 [L,R=301]

### End CyberPanel Generated Rules.

### Rewrite Rules Added by CyberPanel Rewrite Rule Generator

RewriteCond %{HTTPS}  !=on
RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]

### End CyberPanel Generated Rules.


#By blocking access from libwww-perl you can eliminate many simpler attacks
RewriteCond %{HTTP_USER_AGENT} libwww-perl.*
RewriteRule .* ? [F,L]

## EXPIRES CACHING ##
# Add or remove file types if needed
ExpiresActive On
<FilesMatch "\.(jpg|jpeg|woff|woff2|png|gif|swf|ico|js|css|ttf|eot|ico|mp4|webm|svg|json|webp)$">
Header set Cache-Control "max-age=31536000, public, no-transform"
</FilesMatch>

## EXPIRES CACHING ##

#main landing page
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^(.*)$ main.php [L]

The Issue

1. I have a physical folder named: /packages/ residing in the root directory of my server.
2. I would like to capture all queries in pattern of /packages & /packages/example/example/example to a file named: packages_main.php which also resides in the root dir.
3. I have tried the following rules & more & variations

RewriteRule ^packages/(.+) package_main.php?qsa=$1 [L,QSA]
RewriteRule ^packages$ package_main.php [L,QSA]
RewriteRule ^packages package_main.php [L,QSA]
RewriteRule ^packages(.+) package_main.php [L,QSA]

**The problem is that whenever i open https://example.com/packages it gets redirected to https://example.com/packages/ ** Adding a trailing slash at the end.

I want it to stay like https://example.com/packages so that i can pass query strings to the page directly as well e.g. https://example.com/packages?p=10&a=11 but it redirects to https://example.com/packages/?p=10&a=11 which confuses my code.

I want to catch all urls except query strings which are to be passed to the package_main.php directly e.g. https://example.com/packages?p=100, https://example.com/packages/abc/bbc?p=100, https://example.com/packages/abc?p=100

This has taken 3 days of my work but i can't seem to figure it out. So basically i want a rule which redirects all my example.com/packages to package_main.php without adding a trailing slash. As the slash turns the query string as path for package_main.php to understand & it gets picked up incorrectly. Can someone help please.

With your shown samples, attempts please try following .htaccess rules file. Please make sure to clear your browser cache before testing your URLs.

RewriteEngine On
Options +FollowSymlinks -MultiViews -Indexes
DirectorySlash Off

RewriteBase /

#set default characterset from server end
AddDefaultCharset UTF-8

### Rewrite Rules Added by CyberPanel Rewrite Rule Generator
RewriteCond %{HTTP_HOST} ^www.(.*)$
RewriteRule ^(.*)$ http://%1/$1 [L,R=301]

### End CyberPanel Generated Rules.

### Rewrite Rules Added by CyberPanel Rewrite Rule Generator

RewriteCond %{HTTPS}  !=on
RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]

### End CyberPanel Generated Rules.


#By blocking access from libwww-perl you can eliminate many simpler attacks
RewriteCond %{HTTP_USER_AGENT} libwww-perl.*
RewriteRule .* ? [F,L]

## EXPIRES CACHING ##
# Add or remove file types if needed
ExpiresActive On
<FilesMatch "\.(jpg|jpeg|woff|woff2|png|gif|swf|ico|js|css|ttf|eot|ico|mp4|webm|svg|json|webp)$">
Header set Cache-Control "max-age=31536000, public, no-transform"
</FilesMatch>

## EXPIRES CACHING ##

RewriteCond %{QUERFY_STRING} ^$
RewriteRule ^packages/?(.*)?$ package_main.php?qsa=$1 [L,QSA]


#main landing page
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/?$ main.php [L]