Because your figlet ascii sucks.
All known TDF fonts (1198) are included.
make
sudo make install
If you're just trying to spam irc tdfiglet -cm yes hello will suffice.
usage: tdfiglet [options] -f [font] input
-f [font] Specify font file used.
-j l|r|c Justify left, right, or center. Default is left.
-w n Set screen width. Default is 80.
-c a|m Color format ANSI or mirc. Default is ANSI.
-e u|a Encode as unicode or ASCII. Default is unicode.
-i Print font details.
-r Use random font.
-h Print usage.