Ex not spending much time with DCs

[BelleBoyd]

My ex is insisting on seeing the kids every weekend on both days. He is only taking them out for a couple of hours each outing. It's really annoying. I've said he can take them for a proper amount of time-like a whole day out or an afternoon which I think should be around 4 hours.
But he's bringing them back a couple of hours later saying he has nowhere to go with them or it's too cold..
He can't have them at his place as he currently lives somewhere where children aren't permitted.
I find this really tricky as I can't do anything in the time he takes them and I also never know when he might bring them back.
What he really wants to do is spend time at my house with them/us which I've put a stop to recently.
Am I being unreasonable? Not sure what to do...

Yanbu to establishing boundaries and saying no to contact at your house.

If he can only manage 2 hours then it'll have to be 2 hours. I wouldn't like every weekend though. Can he do a weekday evening on alternate weeks instead of a weekend day?

Is his living situation temporary?

What would he do if you were out when he got back?

He won't do weekdays, as he says he might get some work-he's freelance. Or he would want to see them at mine which I don't want to do anymore. Or by the time he's finished work it would be winding down time for the kids-they are still little.
I'm considering going out on his next outing with them. But he would just arrive at the house and I'd either have to let him be here with them and not me or come back.

His current living arrangements have been like this since February this year with no change in sight..

Does he not have family he can take them to?

He needs to start planning things to do with them. Walk to the park, swimming, Mac Donald’s etc. Is he really just collecting them with no plan in mind and wandering about outside?

My BIL had this issue as where he lived didn't allow children and if he had been caught with them he would have been made homeless. Entertaining his kids for long periods was difficult as it involved money he just didn't have so he ended up spending most weekends at my sil's which strained their relationship and her relationship with her partner.
I also understand your need to have boundaries and time away from the kids for more than 2 hours and I hope you can find a compromise. It's also harder to entertain them in this weather unfortunately.

Most of his family aren't nearby enough. No he does usually have an activity planned but it usually only takes a couple of hours. Won't take them on to do something else. I suggest swimming, soft play, museums etc but he will just do the one thing and then bring them back. I don't want to micro manage his time with them and he wouldn't like me to either so beyond suggesting things he's hard to make him take the initiative..