I completely agree, I have been competing with Muay Thai in Brasil and with Taekwondo and even won the European championship 2016 however ....
fighting Jiu Jitsu has a completely different feeling, you are as close as you can get from your opponent, and you can literally feel the constant force rather than kicking and punching then retreating.

and It's the BEST feeling in the world when you use your direct force against your opponent and seeing him submitting to it and vise versa.

Every time I got submitted it pushed me harder and made me stronger both mentally and physically.