Everyone wants to be successful until they see what it actually takes.
Playing your sport hard at age 30, 40, 50, 60 takes work. A lot of work. When you were 18 you could go 0-60 without a warm up and do ok. You could "ride hard and put away wet", forgetting post competition maintenance work and be fine. Turns out you can't run 50 miles a week at age 40 and not doing any maintenance work along with it. Facts are facts.
Those days are over, sorry. It's going to take effort to keep your body moving the way you want. Pre exercise mobility, activation. Post exercise mobility, proper cool down. Mobility throughout your work day. The more silly things we do to our aging bodies, think sitting at a desk, throughout the day the more we need to counteract that. The harder you play the harder you need to recover. Fueling properly, hydrating, performing mobility work as often as your body requires is part of the game. Stop being surprised at how much work it takes to get after it. If it was easy everyone would be out there, instead most are on the couch.
It's not easy. I know it. The sooner you accept the fact its going to be really hard the sooner you can get on with it and start enjoying your sport.
Get outside and play today but warm up first. :)