Hmm...I love weddings and especially putting them on. Yeah, and back in the day, being best man definitely had its perks! However, being the bride's dad or the groom's dad trumps everything. Two of my proudest moments in life. Others were being with friends when their kids got married.
If you hate it that much just don't go. Be polite and let them know you will be unable to attend, no excuses required. Seriously, I am not being mean, but I promise, no one will miss you. Weddings are joyous occasions that friends and relatives cherish. Don't be a stick in the mud, just don't go.