Subwoofer boom is too much for me...

+1 @baylinor 

I switched from ported (for literally 25 years) to sealed and am much happier with the sound.

There's little, if any, substitution for not locating the subwoofer/s in or very near the rooms greatest bass modes.

Playing a low frequency test tone through a subwoofer placed at the listening position while walking the room noting areas with the loudest bass is a simple means of locating the rooms mode location/s.  

If you insist on front wall corner or next to the speakers location, good luck.  

I take it from your post that you are only running one sub.  I know that many people advocate two subs, but I have had very good results with a single SVS 2000.  Plenty of grunt when called for (by a movie typically) but pretty invisible in supplementing the bass response of my La Scalas, which are not known for great bass.  

Either you've got the wrong sub-woofer, else it's in the wrong place in your room or you've got it turned up too high.

Sorry for so many options, but I've got all the basses (ho ho) covered.

This has worked for me every time I’ve set up a sub, whether it be REL or another brand. The idea of keeping the crossover as low as possible while volume high was tough to swallow at first, but now makes sense.

A horrible compromise at best and only recommended if you can do nothing about the response of your mains. Meaning, no high pass filter and won’t/can’t plug your port.

Many A'goners have gone the other way and been much happier.