> it's hard for me to even start tagging
You could start by selecting a bunch of tracks that have a similar naming pattern, then:
right-click -> auto-tag by track -> infer and update tags from filename.
Make the template fit the pattern of the filename.
Eg. for 'ACDC - Dirty Deeds - 02- love at first feel.mp3', you would create the template:
<album artist> - <album> - <track#> - <title>
If the files don't have fixed patterns, then just put <title> as your template.
That will achieve exactly what your requested - the entire filename (minus the extension) will become the title tag.
If you didn't want to tag the files, then you could just add the 'filename' column to your main panel. Similarly, if you made an autoplaylist or library filter of tracks that have an empty title tag, you could customise the main panel columns specifically for those tracks, replacing the title column with the filename column completely.